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Gerard David

Gerard David (c. 1460 – 13 August 1523) was an Early Netherlandish painter and manuscript illuminator known for his brilliant use of color. Only a bare outline of his life survives, although some facts are known. He may have been the Meester gheraet van brugghe who became a master of the Antwerp guild in 1515. He was very successful in his lifetime and probably ran two workshops, in Antwerp and Bruges. Like many painters of his period, his reputation diminished in the 17th century until he was rediscovered in the 19th century.

Life

He was born in Oudewater, now located in the province of Utrecht. His year of birth is approximated as c. 1450–1460 on the basis that he looks to be around 50 years in the 1509 self-portrait found in his Virgin among the Virgins. He is believed to have spent time in Italy from 1470 to 1480, where he was influenced by the Italian Renaissance. He formed his early style under Albert van Oudewater in Haarlem, and moved to Bruges in 1483, where he joined the Guild of Saint Luke in 1484. Upon the death of Hans Memling in 1494, David became Bruges' leading painter. He became dean of the guild in 1501, and in 1496 married Cornelia Cnoop, daughter of the dean of the goldsmiths' guild. David was one of the town's leading citizens.

Ambrosius Benson served his apprenticeship with David, but they came into dispute around 1519 over a number of paintings and drawings Benson had collected from other artists. Because of a large debt owed to him by Benson, David had refused to return the material. Benson pursued the matter legally and won, leading to David serving time in prison.

He died on 13 August 1523 and was buried in the Church of Our Lady at Bruges.

Style
David's surviving work mainly consists of religious scenes. They are characterised by an atmospheric, timeless, and almost dream like serenity, achieved through soft, warm and subtle colourisation, and masterful handling of light and shadow. He is innovative in his recasting of traditional themes and in his approach to landscape, which was then only an emerging genre in northern European painting. His ability with landscape can be seen in the detailed foliage of his Triptych of the Baptism and the forest scene in the New York Nativity.

Many of the art historians of the early 20th century, including Erwin Panofsky and Max Jakob Friedländer saw him as a painter who did little but distill the style of others and painted in an archaic and unimaginative style. However today most view him as a master colourist, and a painter who according to the Metropolitan Museum of Art, worked in a "progressive, even enterprising, mode, casting off his late medieval heritage and proceeding with a certain purity of vision in an age of transition."

In his early work David followed Haarlem artists such as Dirk Bouts, Albert van Oudewater, and Geertgen tot Sint Jans, though he had already given evidence of superior power as a colourist. To this early period belong the St John of the Richard von Kaufmann collection in Berlin and the Salting's St Jerome. In Bruges he came directly under the influence of Memling, the master whom he followed most closely. It was from him that David acquired a solemnity of treatment, greater realism in the rendering of human form, and an orderly arrangement of figures.

He visited Antwerp in 1515 and was impressed with the work of Quentin Matsys, who had introduced a greater vitality and intimacy in the conception of sacred themes. Together they worked to preserve the traditions of the Bruges school against influences of the Italian Renaissance.

Works
The works for which David is best known are the altarpieces painted before his visit to Antwerp: the Marriage of St Catherine at the National Gallery, London; the triptych of the Madonna Enthroned and Saints of the Brignole-Sale collection in Genoa; the Annunciation of the Sigmaringen collection; and above all, the Madonna with Angels and Saints (usually titled The Virgin among the Virgins), which he donated to the Carmelite Nuns of Sion at Bruges, and which is now in the Rouen museum.

Only a few of his works have remained in Bruges: The Judgment of Cambyses, The Flaying of Sisamnes and the Baptism of Christ in the Groeningemuseum, and the Transfiguration in the Church of Our Lady.

The rest were scattered around the world, and to this may be due the oblivion into which his very name had fallen; this, and the fact that, some believed that for all the beauty and the soulfulness of his work, he had nothing innovative to add to the history of art.

Even in his best work he had only given newer variations of the art of his predecessors and contemporaries. His rank among the masters was renewed, however, when a number of his paintings were assembled at the seminal 1902 Gruuthusemuseum, Bruges exhibition of early Flemish painters.

He also worked closely with the leading manuscript illuminators of the day, and seems to have been brought in to paint specific important miniatures himself, among them a Virgin among the Virgins in the Morgan Library, a Virgin and Child on a Crescent Moon in the Rothschild Prayerbook, and a portrait of the Emperor Maximilian in Vienna. Several of his drawings also survive, and elements from these appear in the works of other painters and illuminators for several decades after his death.

Less known but also of high quality are the works of David found in Spanish public collections. The Prado Museum in Madrid owns a table "Rest on the flight into Egypt" resembling the one in the Royal Museum of Fine Arts in Antwerp. The Prado also holds another two Works by the painter, one of them only attributed. Another one of the Spanish capital's Museums, The Thyssen-Bornemisza holds a "Crucifixión" from 1475.

Legacy
At the time of David's death, the glory of Bruges and its painters was on the wane: Antwerp had become the leader in art as well as in political and commercial importance. Of David's pupils in Bruges, only Adriaen Isenbrandt, Albert Cornelis, and Ambrosius Benson achieved importance. Among other Flemish painters, Joachim Patinir and Jan Mabuse were to some degree influenced by him.

David's name had been completely forgotten when in 1866 William Henry James Weale discovered documents about him in the archives of Bruges; these brought to light the main facts of the painter's life and led to the reconstruction of David's artistic personality, beginning with the recognition of David's only documented work, the Virgin Among Virgins at Rouen.

title: Gerard David


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GSM

The Global System for Mobile Communications (GSM) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation (2G) digital cellular networks used by mobile devices such as mobile phones and tablets. GSM is also a trade mark owned by the GSM Association. GSM may also refer to the Full Rate voice codec.

It was first implemented in Finland in December 1991. By the mid-2010s, it became a global standard for mobile communications achieving over 90% market share, and operating in over 193 countries and territories.

2G networks developed as a replacement for first generation (1G) analog cellular networks. The GSM standard originally described a digital, circuit-switched network optimized for full duplex voice telephony. This expanded over time to include data communications, first by circuit-switched transport, then by packet data transport via General Packet Radio Service (GPRS), and Enhanced Data Rates for GSM Evolution (EDGE).

Subsequently, the 3GPP developed third-generation (3G) UMTS standards, followed by the fourth-generation (4G) LTE Advanced and the fifth-generation 5G standards, which do not form part of the ETSI GSM standard.

Beginning in the late 2010s, various carriers worldwide started to shut down their GSM networks. Nevertheless, as a result of the network's widespread use, the acronym "GSM" is still used as a generic term for the plethora of G mobile phone technologies evolved from it.

Initial European development
In 1983, work began to develop a European standard for digital cellular voice telecommunications when the European Conference of Postal and Telecommunications Administrations (CEPT) set up the Groupe Spécial Mobile (GSM) committee and later provided a permanent technical-support group based in Paris. Five years later, in 1987, 15 representatives from 13 European countries signed a memorandum of understanding in Copenhagen to develop and deploy a common cellular telephone system across Europe, and EU rules were passed to make GSM a mandatory standard. The decision to develop a continental standard eventually resulted in a unified, open, standard-based network which was larger than that in the United States.

In February 1987 Europe produced the first agreed GSM Technical Specification. Ministers from the four big EU countries cemented their political support for GSM with the Bonn Declaration on Global Information Networks in May and the GSM MoU was tabled for signature in September. The MoU drew in mobile operators from across Europe to pledge to invest in new GSM networks to an ambitious common date.

In this short 38-week period the whole of Europe (countries and industries) had been brought behind GSM in a rare unity and speed guided by four public officials: Armin Silberhorn (Germany), Stephen Temple (UK), Philippe Dupuis (France), and Renzo Failli (Italy). In 1989 the Groupe Spécial Mobile committee was transferred from CEPT to the European Telecommunications Standards Institute (ETSI). The IEEE/RSE awarded to Thomas Haug and Philippe Dupuis the 2018 James Clerk Maxwell medal for their "leadership in the development of the first international mobile communications standard with subsequent evolution into worldwide smartphone data communication". The GSM (2G) has evolved into 3G, 4G and 5G.

First networks
In parallel France and Germany signed a joint development agreement in 1984 and were joined by Italy and the UK in 1986. In 1986, the European Commission proposed reserving the 900 MHz spectrum band for GSM. It was long believed that the former Finnish prime minister Harri Holkeri made the world's first GSM call on 1 July 1991, calling Kaarina Suonio (deputy mayor of the city of Tampere) using a network built by Nokia and Siemens and operated by Radiolinja. In 2021 a former Nokia engineer Pekka Lonka revealed to Helsingin Sanomat making a test call just a couple of hours earlier. "World's first GSM call was actually made by me. I called Marjo Jousinen, in Salo.", Lonka informed. The following year saw the sending of the first short messaging service (SMS or "text message") message, and Vodafone UK and Telecom Finland signed the first international roaming agreement.

Enhancements
Work began in 1991 to expand the GSM standard to the 1800 MHz frequency band and the first 1800 MHz network became operational in the UK by 1993, called and DCS 1800. Also that year, Telstra became the first network operator to deploy a GSM network outside Europe and the first practical hand-held GSM mobile phone became available.

In 1995 fax, data and SMS messaging services were launched commercially, the first 1900 MHz GSM network became operational in the United States and GSM subscribers worldwide exceeded 10 million. In the same year, the GSM Association formed. Pre-paid GSM SIM cards were launched in 1996 and worldwide GSM subscribers passed 100 million in 1998.

In 2000 the first commercial General Packet Radio Service (GPRS) services were launched and the first GPRS-compatible handsets became available for sale. In 2001, the first UMTS (W-CDMA) network was launched, a 3G technology that is not part of GSM. Worldwide GSM subscribers exceeded 500 million. In 2002, the first Multimedia Messaging Service (MMS) was introduced and the first GSM network in the 800 MHz frequency band became operational. Enhanced Data rates for GSM Evolution (EDGE) services first became operational in a network in 2003, and the number of worldwide GSM subscribers exceeded 1 billion in 2004.

By 2005 GSM networks accounted for more than 75% of the worldwide cellular network market, serving 1.5 billion subscribers. In 2005, the first HSDPA-capable network also became operational. The first HSUPA network launched in 2007. (High Speed Packet Access (HSPA) and its uplink and downlink versions are 3G technologies, not part of GSM.) Worldwide GSM subscribers exceeded three billion in 2008.

Adoption
The GSM Association estimated in 2011 that technologies defined in the GSM standard served 80% of the mobile market, encompassing more than 5 billion people across more than 212 countries and territories, making GSM the most ubiquitous of the many standards for cellular networks.

GSM is a second-generation (2G) standard employing time-division multiple-access (TDMA) spectrum-sharing, issued by the European Telecommunications Standards Institute (ETSI). The GSM standard does not include the 3G Universal Mobile Telecommunications System (UMTS), code-division multiple access (CDMA) technology, nor the 4G LTE orthogonal frequency-division multiple access (OFDMA) technology standards issued by the 3GPP.

GSM, for the first time, set a common standard for Europe for wireless networks. It was also adopted by many countries outside Europe. This allowed subscribers to use other GSM networks that have roaming agreements with each other. The common standard reduced research and development costs, since hardware and software could be sold with only minor adaptations for the local market.

Discontinuation
Telstra in Australia shut down its 2G GSM network on 1 December 2016, the first mobile network operator to decommission a GSM network. The second mobile provider to shut down its GSM network (on 1 January 2017) was AT&T Mobility from the United States. Optus in Australia completed the shut down of its 2G GSM network on 1 August 2017, part of the Optus GSM network covering Western Australia and the Northern Territory had earlier in the year been shut down in April 2017. Singapore shut down 2G services entirely in April 2017.

Network structure
The network is structured into several discrete sections:
 * Base station subsystem – the base stations and their controllers
 * Network and Switching Subsystem – the part of the network most similar to a fixed network, sometimes just called the "core network"
 * GPRS Core Network – the optional part which allows packet-based Internet connections
 * Operations support system (OSS) – network maintenance

Base-station subsystem

GSM utilizes a cellular network, meaning that cell phones connect to it by searching for cells in the immediate vicinity. There are five different cell sizes in a GSM network:

 * macro
 * micro
 * pico
 * femto, and
 * umbrella cells

The coverage area of each cell varies according to the implementation environment. Macro cells can be regarded as cells where the base-station antenna is installed on a mast or a building above average rooftop level. Micro cells are cells whose antenna height is under average rooftop level; they are typically deployed in urban areas. Picocells are small cells whose coverage diameter is a few dozen meters; they are mainly used indoors. Femtocells are cells designed for use in residential or small-business environments and connect to a telecommunications service provider's network via a broadband-internet connection. Umbrella cells are used to cover shadowed regions of smaller cells and to fill in gaps in coverage between those cells.

Cell horizontal radius varies – depending on antenna height, antenna gain, and propagation conditions – from a couple of hundred meters to several tens of kilometers. The longest distance the GSM specification supports in practical use is 35 km. There are also several implementations of the concept of an extended cell, where the cell radius could be double or even more, depending on the antenna system, the type of terrain, and the timing advance.

GSM supports indoor coverage – achievable by using an indoor picocell base station, or an indoor repeater with distributed indoor antennas fed through power splitters – to deliver the radio signals from an antenna outdoors to the separate indoor distributed antenna system. Picocells are typically deployed when significant call capacity is needed indoors, as in shopping centers or airports. However, this is not a prerequisite, since indoor coverage is also provided by in-building penetration of radio signals from any nearby cell.

GSM carrier frequencies
GSM networks operate in a number of different carrier frequency ranges (separated into GSM frequency ranges for 2G and UMTS frequency bands for 3G), with most 2G GSM networks operating in the 900 MHz or 1800 MHz bands. Where these bands were already allocated, the 850 MHz and 1900 MHz bands were used instead (for example in Canada and the United States). In rare cases the 400 and 450 MHz frequency bands are assigned in some countries because they were previously used for first-generation systems.

For comparison, most 3G networks in Europe operate in the 2100 MHz frequency band. For more information on worldwide GSM frequency usage, see GSM frequency bands.

Regardless of the frequency selected by an operator, it is divided into timeslots for individual phones. This allows eight full-rate or sixteen half-rate speech channels per radio frequency. These eight radio timeslots (or burst periods) are grouped into a TDMA frame. Half-rate channels use alternate frames in the same timeslot. The channel data rate for all 8 channels is 270.833 kbit/s, and the frame duration is 4.615 ms. TDMA noise is interference that can be heard on speakers near a GSM phone using TDMA, audible as a buzzing sound. The transmission power in the handset is limited to a maximum of 2 watts in GSM 850/900 and 1 watt in GSM 1800/1900.

Voice codecs
GSM has used a variety of voice codecs to squeeze 3.1 kHz audio into between 7 and 13 kbit/s. Originally, two codecs, named after the types of data channel they were allocated, were used, called Half Rate (6.5 kbit/s) and Full Rate (13 kbit/s). These used a system based on linear predictive coding (LPC). In addition to being efficient with bitrates, these codecs also made it easier to identify more important parts of the audio, allowing the air interface layer to prioritize and better protect these parts of the signal. GSM was further enhanced in 1997 with the enhanced full rate (EFR) codec, a 12.2 kbit/s codec that uses a full-rate channel. Finally, with the development of UMTS, EFR was refactored into a variable-rate codec called AMR-Narrowband, which is high quality and robust against interference when used on full-rate channels, or less robust but still relatively high quality when used in good radio conditions on half-rate channel.

Subscriber Identity Module (SIM)
One of the key features of GSM is the Subscriber Identity Module, commonly known as a SIM card. The SIM is a detachable smart card containing a user's subscription information and phone book. This allows users to retain their information after switching handsets. Alternatively, users can change networks or network identities without switching handsets - simply by changing the SIM.

Phone locking
Sometimes mobile network operators restrict handsets that they sell for exclusive use in their own network. This is called SIM locking and is implemented by a software feature of the phone. A subscriber may usually contact the provider to remove the lock for a fee, utilize private services to remove the lock, or use software and websites to unlock the handset themselves. It is possible to hack past a phone locked by a network operator.

In some countries and regions (e.g. Brazil and Germany) all phones are sold unlocked due to the abundance of dual-SIM handsets and operators.

GSM security
GSM was intended to be a secure wireless system. It has considered the user authentication using a pre-shared key and challenge–response, and over-the-air encryption. However, GSM is vulnerable to different types of attack, each of them aimed at a different part of the network.

Research findings indicate that GSM faces susceptibility to hacking by script kiddies, a term referring to inexperienced individuals utilizing readily available hardware and software. The vulnerability arises from the accessibility of tools such as a DVB-T TV tuner, posing a threat to both mobile and network users. Despite the term "script kiddies" implying a lack of sophisticated skills, the consequences of their attacks on GSM can be severe, impacting the functionality of cellular networks. Given that GSM continues to be the main source of cellular technology in numerous countries, its susceptibility to potential threats from malicious attacks is one that needs to be addressed.

The development of UMTS introduced an optional Universal Subscriber Identity Module (USIM), that uses a longer authentication key to give greater security, as well as mutually authenticating the network and the user, whereas GSM only authenticates the user to the network (and not vice versa). The security model therefore offers confidentiality and authentication, but limited authorization capabilities, and no non-repudiation.

GSM uses several cryptographic algorithms for security. The A5/1, A5/2, and A5/3 stream ciphers are used for ensuring over-the-air voice privacy. A5/1 was developed first and is a stronger algorithm used within Europe and the United States; A5/2 is weaker and used in other countries. Serious weaknesses have been found in both algorithms: it is possible to break A5/2 in real-time with a ciphertext-only attack, and in January 2007, The Hacker's Choice started the A5/1 cracking project with plans to use FPGAs that allow A5/1 to be broken with a rainbow table attack. The system supports multiple algorithms so operators may replace that cipher with a stronger one.

Since 2000, different efforts have been made in order to crack the A5 encryption algorithms. Both A5/1 and A5/2 algorithms have been broken, and their cryptanalysis has been revealed in the literature. As an example, Karsten Nohl developed a number of rainbow tables (static values which reduce the time needed to carry out an attack) and have found new sources for known plaintext attacks. He said that it is possible to build "a full GSM interceptor... from open-source components" but that they had not done so because of legal concerns. Nohl claimed that he was able to intercept voice and text conversations by impersonating another user to listen to voicemail, make calls, or send text messages using a seven-year-old Motorola cellphone and decryption software available for free online.

GSM uses General Packet Radio Service (GPRS) for data transmissions like browsing the web. The most commonly deployed GPRS ciphers were publicly broken in 2011.

The researchers revealed flaws in the commonly used GEA/1 and GEA/2 (standing for GPRS Encryption Algorithms 1 and 2) ciphers and published the open-source "gprsdecode" software for sniffing GPRS networks. They also noted that some carriers do not encrypt the data (i.e., using GEA/0) in order to detect the use of traffic or protocols they do not like (e.g., Skype), leaving customers unprotected. GEA/3 seems to remain relatively hard to break and is said to be in use on some more modern networks. If used with USIM to prevent connections to fake base stations and downgrade attacks, users will be protected in the medium term, though migration to 128-bit GEA/4 is still recommended.

The first public cryptanalysis of GEA/1 and GEA/2 (also written GEA-1 and GEA-2) was done in 2021. It concluded that although using a 64-bit key, the GEA-1 algorithm actually provides only 40 bits of security, due to a relationship between two parts of the algorithm. The researchers found that this relationship was very unlikely to have happened if it was not intentional. This may have been done in order to satisfy European controls on export of cryptographic programs.

Standards information
The GSM systems and services are described in a set of standards governed by ETSI, where a full list is maintained.

GSM open-source software
Several open-source software projects exist that provide certain GSM features:
 * gsmd daemon by Openmoko
 * OpenBTS develops a Base transceiver station
 * The GSM Software Project aims to build a GSM analyzer for less than $1,000
 * OsmocomBB developers intend to replace the proprietary baseband GSM stack with a free software implementation
 * YateBTS develops a Base transceiver station

Issues with patents and open source
Patents remain a problem for any open-source GSM implementation, because it is not possible for GNU or any other free software distributor to guarantee immunity from all lawsuits by the patent holders against the users. Furthermore, new features are being added to the standard all the time which means they have patent protection for a number of years.

The original GSM implementations from 1991 may now be entirely free of patent encumbrances, however patent freedom is not certain due to the United States' "first to invent" system that was in place until 2012. The "first to invent" system, coupled with "patent term adjustment" can extend the life of a U.S. patent far beyond 20 years from its priority date. It is unclear at this time whether OpenBTS will be able to implement features of that initial specification without limit. As patents subsequently expire, however, those features can be added into the open-source version. , there have been no lawsuits against users of OpenBTS over GSM use.

license: Creative Commons - Attribution Share-Alike - https://creativecommons.org/licenses/by-sa/4.0/

title: GSM


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Garry Kasparov

Garry Kimovich Kasparov (born Garik Kimovich Weinstein on 13 April 1963) is a Russian chess grandmaster, former World Chess Champion (1985–2000), political activist and writer. His peak FIDE chess rating of 2851, achieved in 1999, was the highest recorded until being surpassed by Magnus Carlsen in 2013. From 1984 until his retirement from regular competitive chess in 2005, Kasparov was ranked world no. 1 for a record 255 months overall. Kasparov also holds records for the most consecutive professional tournament victories (15) and Chess Oscars (11).

Kasparov became the youngest-ever undisputed world champion in 1985 at age 22 by defeating then-champion Anatoly Karpov. He defended the title against Karpov three times, in 1986, 1987 and 1990. Kasparov held the official FIDE world title until 1993, when a dispute with FIDE led him to set up a rival organisation, the Professional Chess Association. In 1997, he became the first world champion to lose a match to a computer under standard time controls when he was defeated by the IBM supercomputer Deep Blue in a highly publicised match. He continued to hold the "Classical" world title until his defeat by Vladimir Kramnik in 2000. Despite losing the PCA title, he continued winning tournaments and was the world's highest-rated player at the time of his official retirement. Kasparov coached Carlsen in 2009–10, during which time Carlsen rose to world no. 1. Kasparov stood unsuccessfully for FIDE president in 2013–2014.

Since retiring from chess, Kasparov has devoted his time to writing and politics. His book series My Great Predecessors, first published in 2003, details the history and games of the world champion chess players who preceded him. He formed the United Civil Front movement and was a member of The Other Russia, a coalition opposing the administration and policies of Vladimir Putin. In 2008, he announced an intention to run as a candidate in that year's Russian presidential race, but after encountering logistical problems in his campaign, for which he blamed "official obstruction", he withdrew. In the wake of the Russian mass protests that began in 2011, he announced in June 2013 that he had left Russia for the immediate future out of fear of persecution. Following his flight from Russia, he lived in New York City with his family. In 2014, he obtained Croatian citizenship and has maintained a residence in Podstrana near Split.

Kasparov was chairman of the Human Rights Foundation from 2011 to 2024. In 2017, he founded the Renew Democracy Initiative (RDI), an American political organisation promoting and defending liberal democracy in the U.S. and abroad. He serves as chairman of the group. Kasparov is also a security ambassador for the software company Avast.

Early life
Kasparov was born Garik Kimovich Weinstein (Гарик Кимович Вайнштейн) in Baku, Azerbaijan SSR (now Azerbaijan), Soviet Union. His father, Kim Moiseyevich Weinstein, was Jewish and his mother, Klara Shagenovna Kasparova, was Armenian. Both of his mother's parents were Armenians from Nagorno-Karabakh. Kasparov has described himself as a "self-appointed Christian", although "very indifferent" and identifying as Russian: "[A]lthough I'm half-Armenian, half-Jewish, I consider myself Russian because Russian is my native tongue, and I grew up with Russian culture." Kasparov and his family had to flee anti-Armenian pogroms in Baku in January 1990 that were coordinated by local leaders with Soviet acquiescence.

According to Kasparov himself, he was named after United States President Harry Truman, "whom my father admired for taking a strong stand against communism. It was a rare name in Russia, until Harry Potter came along."

Introduction to chess
Kasparov began the serious study of chess after he came across a problem set up by his parents and proposed a solution. When he was seven years old, his father died of leukaemia. At the age of twelve, Kasparov, upon the request of his mother Klara and with the consent of the family, adopted Klara's surname Kasparov, which was done to avoid possible anti-Semitic tensions common in the USSR at the time.

From age seven, Kasparov attended the Young Pioneer Palace in Baku and, at ten, began training at Mikhail Botvinnik's chess school under coach Vladimir Makogonov. Makogonov helped develop Kasparov's positional skills and taught him to play the Caro–Kann Defence and the Tartakower System of the Queen's Gambit Declined. Kasparov won the Soviet Junior Championship in Tbilisi in 1976, scoring 7/9 points, at age thirteen. He repeated the feat the following year, winning with a score of 8.5/9. He was being coached by Alexander Shakarov during this time.

In 1978, Kasparov participated in the Sokolsky Memorial tournament in Minsk. He had received a special invitation to enter the tournament but took first place and became a chess master. Kasparov has stressed that this event was a turning point in his life and that it convinced him to choose chess as his career: "I will remember the Sokolsky Memorial as long as I live", he wrote. He has also said that after the victory, he thought he had a very good shot at the world championship.

Rising up the ranks
He first qualified for the USSR Chess Championship at age 15 in 1978, the youngest-ever player at that level. He won the 64-player Swiss system tournament at Daugavpils on a tie-break over Igor V. Ivanov to capture the sole qualifying place.

Kasparov rose quickly through the FIDE world rankings. Due to an oversight by the USSR Chess Federation, which believed that a grandmaster tournament in Banja Luka, Yugoslavia, was for juniors, he participated in that event in 1979 while still unrated. He was a replacement for the Soviet defector Viktor Korchnoi, who was originally invited but withdrew due to the threat of a boycott from the Soviets. Kasparov won this high-class tournament, emerging with a provisional rating of 2595, enough to catapult him to the top group of chess players (at the time, number 15 in the world). The next year, 1980, he won the World Junior Chess Championship in Dortmund, West Germany. Later that year, he made his debut as the second reserve for the Soviet Union at the Chess Olympiad at Valletta, Malta, and became a Grandmaster.

As a teenager, Kasparov shared the USSR Chess Championship in 1981 with Lev Psakhis (12.5/17), although Psakhis won their game. His first win in a superclass-level international tournament was scored at Bugojno, Yugoslavia, in 1982. He earned a place in the 1982 Moscow Interzonal tournament, which he won, to qualify for the Candidates Tournament. At age 19, he was the youngest Candidate since Bobby Fischer, who was 15 when he qualified in 1958. At this stage, he was already the No. 2-rated player in the world, trailing only world champion Karpov on the January 1983 list.

Kasparov's first (quarter-final) Candidates match was against Alexander Beliavsky, whom he defeated 6–3 (four wins, one loss). Politics threatened Kasparov's semi-final against Korchnoi, which was scheduled to be played in Pasadena, California. Korchnoi had defected from the Soviet Union in 1976 and was at that time the strongest active non-Soviet player. The Soviet authorities would not allow Kasparov to travel to the United States, meaning that Korchnoi could have had a walkover. This decision was met with disapproval by the chess world, and Korchnoi agreed to the match to being played in London instead, along with the previously scheduled match between Vasily Smyslov and Zoltán Ribli. The Kasparov-Korchnoi match was put together on short notice by Raymond Keene. Kasparov lost the first game but won the match 7–4 (four wins, one loss).

In January 1984, Kasparov became the No. 1 ranked player in the world, with a FIDE rating of 2710. He became the youngest-ever world No. 1, a record that lasted 12 years until being broken by Kramnik in January 1996. That same year, he won the Candidates' final 8½–4½ (four wins, no losses) against former world champion Smyslov at Vilnius, thus qualifying to play Karpov for the world championship.

1984 world championship
The World Chess Championship 1984 match between Kasparov and Karpov had many ups and downs and a very controversial finish. Karpov started in very good form, and after nine games Kasparov was down 4–0 in a "first to six wins" match. Fellow players predicted he would be whitewashed 6–0 within 18 games.

In an unexpected turn of events, there followed a series of 17 successive draws, some relatively short, others drawn in unsettled positions. Kasparov lost game 27 (5–0), then fought back with another series of draws until game 32, earning his first-ever win against the world champion and bringing the score to 5–1. Another 14 successive draws followed, through game 46; the previous record length for a world title match had been 34 games (José Raúl Capablanca vs. Alexander Alekhine in 1927).

Kasparov won games 47 and 48 to bring the score to 5–3 in Karpov's favour. Then the match was ended without result by FIDE President Florencio Campomanes, and a new match was announced to start a few months later. The termination was controversial, as both players stated that they preferred the match to continue. Announcing his decision, Campomanes cited the health of the players, which had been strained by the length of the match. According to grandmasters Boris Gulko and Korchnoi, and historians Vladimir Popow and Yuri Felshtinsky in their The KGB Plays Chess book, Campomanes had been a KGB agent and was tasked with preventing Karpov's defeat at all costs. The match was terminated while Karpov was still ahead to avoid the impression that the decision had been made for his benefit.

The match became the first, and so far only, world championship match to be abandoned without a result. Kasparov's relations with Campomanes and FIDE became strained, and matters came to a head in 1993 with Kasparov's complete break-away from FIDE.

World champion
The second Karpov–Kasparov match in 1985 was organised in Moscow as the best of 24 games, where the first player to win 12½ points would claim the title. The scores from the terminated match would not carry over; however, in the event of a 12–12 draw, the title would remain with Karpov. On 9 November 1985, Kasparov secured the world crown by a score of 13–11. Karpov, with White, needed to win the 24th game to retain the title but Kasparov won it with the Sicilian Defence. He was 22 years old at the time, making him the youngest-ever world champion, a record held by Mikhail Tal for over 20 years. Kasparov's win with Black in the 16th game has been recognised as one of the all-time chess masterpieces, including being voted the best game played during the first 64 issues of the magazine Chess Informant.

As part of the arrangements following the aborted 1984 match, Karpov had been granted (in the event of his defeat) a right to rematch. Another match took place in 1986, hosted jointly in London and Leningrad, with each city hosting 12 games. At one point in the match, Kasparov opened a three-point lead and looked well on his way to a decisive victory. But Karpov fought back by winning three consecutive games to level the score late in the match. At this point, Kasparov dismissed one of his seconds, grandmaster Evgeny Vladimirov, accusing him of selling his opening preparation to the Karpov team (as described in Kasparov's autobiography Unlimited Challenge, chapter Stab in the Back). Kasparov scored one more win and kept his title by a score of 12½–11½.

A fourth match for the world title took place in 1987 in Seville, as Karpov had qualified through the Candidates' Matches to become the official challenger once again. This match was also very close, with neither player holding more than a one-point lead at any time. With one game left, Kasparov was down a point and needed a win to draw the match and retain his title. A long, tense game ensued in which Karpov blundered away a pawn just before the first time control. Kasparov then won a long ending to retain the title on a 12–12 scoreline.

Kasparov and Karpov met for a fifth time, on this occasion in New York City and Lyon in 1990, with each city hosting 12 games. Again the result was a close one, with Kasparov winning by a margin of 12½–11½. In their five world championship matches, Kasparov had 21 wins, 19 losses and 104 draws in 144 games.

Break with and ejection from FIDE
In November 1986, Kasparov had created the Grandmasters Association (GMA) to represent professional players and give them more say in FIDE's activities. Kasparov assumed a leadership role. GMA's major achievement was in organising a series of six World Cup tournaments for the world's top players. This caused an uneasy relationship to develop between Kasparov and FIDE. The previous month Kasparov had made his feelings clear to fellow grandmaster Keene: "Campomanes must go. It is war to the death with him as far as I am concerned. I will do everything I can to remove him”.

This stand-off lasted until 1993, by which time a new challenger had qualified through the Candidates cycle: Nigel Short, a British grandmaster who had defeated Karpov in a qualifying match and then Jan Timman in the finals held in early 1993. After a confusing and compressed bidding process produced lower financial estimates than expected, the world champion and his challenger both rejected FIDE's bid for an August match in Manchester and decided to play outside FIDE's jurisdiction. Their match took place under the auspices of the Professional Chess Association (PCA), an organisation established by Kasparov and Short. At this point, a fracture occurred in the lineage of the FIDE World Championship. In an interview in 2007, Kasparov called the break with FIDE in 1993 the worst mistake of his career, as it hurt the game in the long run.

Kasparov and Short were ejected from FIDE and played their well-sponsored match in London in September 1993. Kasparov won convincingly by a score of 12½–7½. The match considerably raised the profile of chess in the UK, with a substantial level of coverage on Channel 4. Meanwhile, FIDE organised its world championship match between Timman (the defeated Candidates finalist) and former world champion Karpov (a defeated Candidates semi-finalist), which Karpov won.

FIDE removed Kasparov and Short from its rating list. Subsequently, the PCA created a rating list of its own, which featured all the world top players regardless of their relation to FIDE. There were now two world champions: PCA champion Kasparov and FIDE champion Karpov. The title remained split for 13 years.

Kasparov defended his PCA title in a 1995 match against Viswanathan Anand at the World Trade Center in New York City. Kasparov won the match by four wins to one, with thirteen draws.

Kasparov tried to organise another world championship match under a different organisation, the World Chess Association (WCA), with Linares organiser Luis Rentero. Alexei Shirov and Kramnik played a candidates match to decide the challenger, which Shirov won in an upset. But when Rentero admitted that the funds required and promised had never materialised, the WCA collapsed. Yet another body stepped in, BrainGames.com, headed by Raymond Keene. After a match with Shirov could not be agreed by BrainGames.com and talks with Anand collapsed, a match was instead arranged against Kramnik.

During this period, Kasparov was approached by Oakham School in the United Kingdom, at the time the only school in the country with a full-time chess coach, and developed an interest in the use of chess in education. In 1997, Kasparov supported a scholarship programme at the school. Kasparov also won the Marca Leyenda trophy that year.

In 1999, he played a well-known game against Topalov wherein he won after a rook sacrifice and king hunt.

Losing the title and aftermath
The Kasparov-Kramnik match took place in London during the latter half of 2000. Kramnik had been a student of Kasparov's at the famous Botvinnik/Kasparov chess school in Russia and had served on Kasparov's team for the 1995 match with Anand.

The better-prepared Kramnik won game 2 against Kasparov's Grünfeld Defence and achieved winning positions in games 4 and 6, although Kasparov managed a draw in both games. Kasparov made a critical error in game 10 with the Nimzo-Indian Defence, which Kramnik exploited to win in 25 moves. As White, Kasparov could not crack the passive but solid Berlin Defence in the Ruy Lopez, and Kramnik managed to draw all his games as Black. Kramnik won the match 8½–6½.

Kasparov won a series of major tournaments and remained the PCA top-rated player in the world, ahead of both Kramnik and the FIDE World Champion. In 2001 he refused an invitation to the 2002 Dortmund Candidates Tournament for the Classical title, claiming his results had earned him a rematch with Kramnik.

Kasparov and Karpov played a four-game match with rapid time controls over two days in December 2002 in New York City. Kasparov suffered a surprise loss (1.5 – 2.5).

Because of Kasparov's continuing strong results and status as FIDE world No. 1, he was included in the so-called "Prague Agreement", masterminded by Yasser Seirawan and intended to reunite the two world championships. Kasparov was to play a match against the FIDE World Champion Ponomariov in September 2003. But this match was called off after Ponomariov refused to sign his contract for it without reservation. In its place, there were plans for a match against Rustam Kasimdzhanov, winner of the FIDE World Chess Championship 2004, to be held in January 2005 in the United Arab Emirates. These also fell through owing to a lack of funding. Plans to hold the match in Turkey instead came too late. Kasparov announced in January 2005 that he was tired of waiting for FIDE to arrange a match and had decided to stop all efforts to become undisputed world champion once more.

Retirement from regular competitive chess
After winning the prestigious Linares tournament for the ninth time, Kasparov announced on 10 March 2005 that he would retire from regular competitive chess. He cited as the reason a lack of personal goals in the chess world. When winning the Russian championship in 2004, he commented that it had been the last major title he had never won outright. He also expressed frustration at the failure to reunify the world championship.

Kasparov said he might play in some rapid chess events for fun, but he intended to spend more time on his books, including the My Great Predecessors series, and work on the links between decision-making in chess and other areas of life. He also stated that he would continue to involve himself in Russian politics, which he viewed as "headed down the wrong path."

Post-retirement chess
On 22 August 2006, in his first public chess games since his retirement, Kasparov played in the Lichthof Chess Champions Tournament, a blitz event played at the time control of five minutes per side and three-second increments per move. Kasparov tied for first with Karpov, scoring 4½/6.

Kasparov and Karpov played a 12-game match from 21 to 24 September 2009, in Valencia, Spain. It consisted of four rapid (or semi rapid) games, in which Kasparov won 3–1, and eight blitz games, in which Kasparov won 6–2, winning the match with a final result of 9–3. The event took place exactly 25 years after the two players' unfinished encounter at World Chess Championship 1984.

Kasparov coached Carlsen for approximately one year, beginning in February 2009. The collaboration remained secret until September 2009. Under Kasparov's tutelage, Carlsen in October 2009 became the youngest ever to achieve a FIDE rating higher than 2800, and he rose from world number four to world number one. While the pair initially planned to work together throughout 2010, in March of that year it was announced that Carlsen had split from Kasparov and would no longer be using him as a trainer. According to an interview with the German magazine Der Spiegel, Carlsen indicated that he would remain in contact and that he would continue to attend training sessions with Kasparov; however, no further training sessions were held, and the cooperation fizzled out over the course of the spring. In 2011, Carlsen said: "Thanks to [Kasparov] I began to understand a whole class of positions better. ... Kasparov gave me a great deal of practical help." In 2012, when asked what he learnt from working with Kasparov, Carlsen answered: "Complex positions. That was the most important thing."

In May 2010, Kasparov played and won 30 games simultaneously against players at Tel Aviv University in Israel. In the same month, it was revealed that he had aided Anand in his preparation for the World Chess Championship 2010 against challenger Veselin Topalov. Anand won the match 6½–5½ to retain the title.

Kasparov began training the U.S. grandmaster Hikaru Nakamura in January 2011. The first of several training sessions was held in New York just before Nakamura participated in the Tata Steel Chess tournament in Wijk aan Zee, the Netherlands. In December 2011, it was announced that their cooperation had come to an end.

Kasparov played two blitz exhibition matches in the autumn of 2011. The first was in September against French grandmaster Maxime Vachier-Lagrave, in Clichy (France), which Kasparov won 1½–½. The second was a longer match consisting of eight blitz games played on 9 October, against English grandmaster Short. Kasparov won again by a score of 4½–3½. A little after that, in October 2011, Kasparov played and defeated fourteen opponents in a simultaneous exhibition that took place in Bratislava.

On 25 and 26 April 2015, Kasparov played a mini-match against Short. The match consisted of two rapid games and eight blitz games and was contested over the course of two days. Commentators GM Maurice Ashley and Alejandro Ramírez remarked how Kasparov was an 'initiative hog' throughout the match, consistently not allowing Short to gain any foothold in the games. Kasparov won the match decisively (8½–1½), winning all five games on the second day. These victories were characterised by aggressive pawn moves breaking up Short's position, thereby allowing Kasparov's pieces to achieve positional superiority.

Kasparov played and won all nineteen games of a simultaneous exhibition in Pula, Croatia on 19 August 2015. At the Chess Club and Scholastic Center of Saint Louis on 28 and 29 April 2016, Kasparov played a 6-round exhibition blitz round-robin tournament with Fabiano Caruana, Wesley So and Nakamura in an event called the Ultimate Blitz Challenge. He finished the tournament third with 9.5/18, behind Nakamura (11/18) and So (10/18). At the post-tournament interview, Kasparov announced that he would donate his winnings from playing the next top-level blitz exhibition match to assist funding of the American Olympic Team.

On 2 June 2016, Kasparov played against fifteen chess players in a simultaneous exhibition in the Kaiser-Friedrich-Halle of Mönchengladbach. He won all games.

Candidate for FIDE presidency
On 7 October 2013, Kasparov announced his candidacy for World Chess Federation president during a reception in Tallinn, Estonia, where the 84th FIDE Congress took place. He was supported by reigning world champion and FIDE #1 ranked player Carlsen. At the FIDE General Assembly in August 2014, Kasparov lost the presidential election to the incumbent Kirsan Ilyumzhinov, with a vote of 110–61.

A few days before the election took place, the New York Times Magazine had published a report on the viciously fought campaign. Included was information about a leaked contract between Kasparov and former FIDE Secretary General Ignatius Leong from Singapore, in which the Kasparov campaign reportedly "offered to pay Leong US$500,000 and to pay $250,000 a year for four years to the ASEAN Chess Academy, an organisation Leong helped create to teach the game, specifying that Leong would be responsible for delivering 11 votes from his region [...]". In September 2015, the FIDE Ethics Commission found Kasparov and Leong guilty of violating its Code of Ethics and later suspended them for two years from all FIDE functions and meetings.

Return from chess retirement
Kasparov came out of retirement to participate in the inaugural St. Louis Rapid and Blitz tournament from 14 to 19 August 2017, scoring 3.5/9 in the rapid and 9/18 in the blitz. He finished eighth in a strong field of ten, including Nakamura, Caruana, former world champion Anand and the eventual winner, Levon Aronian. Kasparov promised that any tournament money he earned would go towards charities to promote chess in Africa.

In 2020, he participated in 9LX, a Chess 960 tournament, and finished eighth of a field of ten players. His game against Carlsen, who tied for first place, was drawn.

He launched Kasparovchess, a subscription-based online chess community featuring documentaries, lessons, puzzles, podcasts, articles, interviews and playing zones, in 2021.

Kasparov played in the blitz section of the Grand Chess Tour 2021 event in Zagreb, Croatia. He performed poorly, however, scoring 0.5/9 on the first day and 2/9 on the second day, getting his only win against Jorden Van Foreest. He also participated in 9LX 2, finishing fifth in a field of ten players, with a score of 5/9.

Olympiads and major team events
Kasparov played in a total of eight Chess Olympiads. He represented the Soviet Union four times and Russia four times, following the break-up of the Soviet Union in 1991. In his 1980 Olympiad debut, he became, at age 17, the youngest player to represent the Soviet Union or Russia at that level, a record which was broken by Kramnik in 1992. In 82 games, he scored (+50−3=29), for 78.7%, and won a total of nineteen medals, including team gold medals all eight times he competed.

For the 1994 Moscow Olympiad, he had a significant organisational role in helping to put together the event on short notice, after Thessaloniki cancelled its offer to host only a few weeks before the scheduled dates. Kasparov's detailed Olympiad record follows:
 * Valletta 1980, USSR 2nd reserve, 9½/12 (+8−1=3), team gold, board bronze;
 * Lucerne 1982, USSR 2nd board, 8½/11 (+6−0=5), team gold, board bronze;
 * Dubai 1986, USSR 1st board, 8½/11 (+7−1=3), team gold, board gold, performance gold;
 * Thessaloniki 1988, USSR 1st board, 8½/10 (+7−0=3), team gold, board gold, performance gold;
 * Manila 1992, Russia board 1, 8½/10 (+7−0=3), team gold, board gold, performance silver;
 * Moscow 1994, Russia board 1, 6½/10 (+4−1=5), team gold;
 * Yerevan 1996, Russia board 1, 7/9 (+5−0=4), team gold, board silver, performance gold;
 * Bled 2002, Russia board 1, 7½/9 (+6−0=3), team gold, performance gold.

Kasparov made his international debut for the USSR at age 16 in the 1980 European Team Championship and played for Russia in the 1992 edition of that championship. He won a total of five medals. His detailed record in this event follows:
 * Skara 1980, USSR 2nd reserve, 5½/6 (+5−0=1), team gold, board gold;
 * Debrecen 1992, Russia board 1, 6/8 (+4−0=4), team gold, board gold, performance silver.

Kasparov also represented the USSR once at the Youth Olympiad in Austria (1981). He scored 9/10 (+8–0=2) on the top board and his team lifted the title.

Assessment and legacy
Kasparov received a Chess Oscar eleven times as the best chess player of the year, in 1982-1983, 1985-1988, 1995-1996, 1999, and 2001-2002. Between 1981 and 1991, he won or tied for first place in every tournament he entered. In 1999, Kasparov reached an Elo rating of 2851 points, a record that stood for over thirteen years: on 10 December 2012, Carlsen achieved an unofficial rating of 2861 points, with which he topped the next release of the rating in January 2013. With the exception of the PCA period and sharing first place with Kramnik in 1997, Kasparov led the rating list from 1985 to 2006 – a total of 255 months. On 1 January 2006, Kasparov ranked first with a coefficient of 2812. However, he was excluded from the FIDE rating list of 1 April 2006 because he had not participated in tournaments for the previous twelve months.

The rivalry between Kasparov and Karpov (often referred to as the "two Ks") is one of the greatest in the history of chess. In six years they played five matches comprising 144 games. For a long time there was personal enmity between Karpov and Kasparov. The conflict between the two men also had a political connotation. Karpov was considered a representative of the Soviet nomenklatura, while Kasparov was young and popular, positioned himself as a "child of change", willingly gave candid interviews and (especially in the West) had an aura of a rebel, although he never was a dissident. Kasparov's 1985 victory coincided with the start of perestroika in the Soviet Union.

Carlsen said of Kasparov: "I've never seen someone with such a feel for dynamics in complex positions." Kramnik has opined that Kasparov's "capacity for study is second to none", adding "There is nothing in chess he has been unable to deal with."

In 2007, the international consulting company Synectics published a rating of 100 living geniuses in science, politics, art and entrepreneurship, in which Kasparov ranked 25th.

Playing style
Kramnik called Kasparov a chess player with virtually no weaknesses. His games are characterised by a dynamic style of play with a focus on tactics, depth of strategy, subtle calculation and original opening ideas. Kasparov was known for his extensive opening preparation and aggressive play in it. Sergey Shipov considered Kasparov's moral and volitional qualities (impulsiveness and psychological instability) and excessive reliance on options, which can lead to overwork and mistakes, as amongst his few shortcomings.

Kasparov's attacking style of play has been compared by many to Alekhine, his chess idol since childhood. Kasparov has described his style as being influenced chiefly by Alekhine, Tal and Fischer. Other influences on Kasparov were his early coaches. At a young age, he met with experienced teachers Alexander Nikitin and Alexander Shakarov. Shakarov collected and systematised materials, and then became the keeper of Kasparov's "information bank". A revolutionary step at that time was the involvement of computer programs in analysing games, and it was Kasparov and his team who took the first steps in this direction. In 1973, Kasparov entered the Botvinnik school and immediately attracted attention. Botvinnik commented on the young schoolboy: "Garry's speed and memory capacity are amazing. He counts deep variations and finds unexpected moves. The power of combinational vision makes him similar to Alekhine himself".

Contributions to opening theory
Kasparov has made many contributions to opening theory. In the 1990s, he systematically developed new variants with computer programs. He also "reanimated" the Scotch Game in top-level competitions. Kasparov successfully used this opening, which was considered outdated, in the 1990 match against Karpov and in matches with Short and Anand. One of the offshoots of the Sicilian in the Szén Variation is called the Kasparov Gambit. Kasparov used this variation in the 12th and 16th games of the match with Karpov in 1985; in the second of these games, he scored a victory.

Another well-known case of winning an important game thanks to a novelty in the opening is Kasparov's 10th game of the 1995 match against Anand. On the 14th move, in a well-known position of the open variation of the Spanish Game (Ruy Lopez), Kasparov discovered a new idea with a rook sacrifice, which brought a decisive attack.

Kasparov has also co-authored several books on opening theory.

Chess rating
Kasparov holds the record for the longest time as the No. 1 rated player in the world—from 1984 to 2005 (Kramnik shared the No. 1 ranking with him once, in the January 1996 FIDE rating list). He headed the PCA rating list during the split from FIDE. At the time of his retirement, he was still ranked No. 1 in the world, with a rating of 2812. His rating has fallen inactive since the January 2006 rating list.

In January 1990, Kasparov achieved the (then) highest FIDE rating ever, passing 2800 and breaking Fischer's old record of 2785. By the July 1999 and January 2000 FIDE rating lists, Kasparov had reached a 2851 Elo rating, at that time the highest rating ever achieved. He held that record until Carlsen attained a new record high rating of 2861 in January 2013.

Other achievements
Kasparov holds the record for most consecutive professional tournament victories, placing first or equal first in fifteen individual tournaments from 1981 to 1990. The streak was broken by Vasyl Ivanchuk at Linares 1991, where Kasparov placed second, half a point behind him after losing their individual game. The details of this record winning streak follow:
 * Frunze 1981, USSR Championship, 12½/17, tie for 1st;
 * Bugojno 1982, 9½/13, 1st;
 * Moscow 1982, Interzonal, 10/13, 1st;
 * Nikšić 1983, 11/14, 1st;
 * Brussels OHRA 1986, 7½/10, 1st;
 * Brussels SWIFT 1987, 8½/11, tie for 1st;
 * Amsterdam Optiebeurs 1988, 9/12, 1st;
 * Belfort (World Cup) 1988, 11½/15, 1st;
 * Moscow 1988, USSR Championship, 11½/17, tie for 1st;
 * Reykjavík (World Cup) 1988, 11/17, 1st;
 * Barcelona (World Cup) 1989, 11/16, tie for 1st;
 * Skellefteå (World Cup) 1989, 9½/15, tie for 1st;
 * Tilburg 1989, 12/14, 1st;
 * Belgrade (Investbank) 1989, 9½/11, 1st;
 * Linares 1990, 8/11, 1st.

Kasparov went nine years winning every super-tournament he played, in addition to contesting his series of five consecutive matches with Karpov. His only failure in this time period in either tournament or match play was the 1984 world title match against Karpov.

In the late 1990s, Kasparov went on another long streak of ten consecutive super-tournament wins.
 * Wijk aan Zee Hoogovens 1999, 10/13, 1st;
 * Linares 1999, 10½/14, 1st;
 * Sarajevo 1999, 7/9, 1st;
 * Wijk aan Zee Corus 2000, 9½/13, 1st;
 * Linares 2000, 6/10, tie for 1st;
 * Sarajevo 2000, 8½/11, 1st;
 * Wijk aan Zee Corus 2001, 9/13, 1st;
 * Linares 2001, 7.5/10, 1st;
 * Astana 2001, 7/10, 1st;
 * Linares 2002, 8/12, 1st.

In these tournament victories, Kasparov had a score of 53 wins, 61 draws and 1 loss in 115 games, his only defeat coming against Ivan Sokolov in Wijk aan Zee 1999.

Notable games

 * Anatoly Karpov vs Garry Kasparov, World Chess Championship 1985, Game 16, Sicilian Defence, Taimanov variation (B44), 0-1 An example of him at his very best, Kasparov takes advantage of Karpov's setup in the opening, offering a pawn sacrifice before dominating all three of White's major pieces with an "octopus knight" on d3.
 * Garry Kasparov vs Veselin Topalov, Hoogovens Tournament Group A, Wijk aan Zee 1999, Round 4, Pirc Defence (B07), 1-0 In what is widely regarded as his masterpiece, Kasparov unleashes multiple brilliancies as he hunts down Black's king from one side of the board to another, ending in a precise combination.

Chess and computers
Acorn Computers acted as one of the sponsors for Kasparov's Candidates semi-final match against Korchnoi in 1983. This was Kasparov's first introduction to computers. Kasparov was awarded a BBC Micro, which he took back with him to Baku, making it perhaps one of the first Western-made microcomputers to reach the Soviet Union at that time.

Computer chess magazine editor Frederic Friedel consulted with Kasparov in 1985 on how a chess database program would be useful preparation for competition. Friedel founded Chessbase two years later, and he gave a copy of the program to Kasparov, who started using it in his preparation. That same year, Kasparov played against thirty-two chess computers in Hamburg, winning all games. Several commercially available Kasparov computers were made in the 1980s, the Saitek Kasparov Turbo King models. On 22 October 1989, Kasparov defeated the chess computer Deep Thought in both games of a two-game match. In December 1992, Kasparov played thirty-seven blitz games against Fritz 2 in Cologne, winning 24, drawing 4 and losing 9.

Kasparov cooperated in producing video material for the computer game Kasparov's Gambit released by Electronic Arts in November 1993. In April 1994, Intel acted as a sponsor for the first Professional Chess Association Grand Prix event in Moscow, played at a time control of twenty-five minutes per game. In May, Chessbase's Fritz 3 running on an Intel Pentium PC defeated Kasparov in their first game in the Intel Express blitz tournament in Munich, but Kasparov managed to tie it for first and won the play-off (+3=2). The next day, Kasparov lost to Fritz 3 again in a game on ZDF TV. In August, Kasparov was knocked out of the London Intel Grand Prix by Richard Lang's ChessGenius 2 program in the first round. In 1995, during Kasparov's world title match with Anand, he unveiled an opening novelty that had been checked with a chess engine, an approach that would become increasingly common in subsequent years.

Kasparov played in a pair of six-game chess matches with IBM supercomputer Deep Blue. The first match took place in Philadelphia in February 1996 and was won by Kasparov (4-2). The second was played in New York City in May 1997 and won by Deep Blue (3½–2½). The 1997 match was the first defeat of a reigning world champion by a computer under tournament conditions. The match was even after five games but Kasparov lost quickly in Game 6. Kasparov said that he was "not well prepared" to face Deep Blue in 1997. He said that based on his "objective strengths" his play was stronger than that of Deep Blue. Kasparov claimed that several factors weighed against him in this match. In particular, he was denied access to Deep Blue's recent games, in contrast to the computer's team, which could study hundreds of Kasparov's.

After the loss, Kasparov said that he sometimes saw deep intelligence and creativity in the machine's moves, suggesting that during the second game chess players had intervened in contravention of the rules. IBM denied that it had cheated, stating the only human intervention occurred between games. The rules provided for the developers to modify the program between games, an opportunity they said they used to shore up weaknesses in the computer's play revealed during the course of the match. Kasparov requested printouts of the machine's log files but IBM refused, although the company later published them on the Internet. Much later, it was suggested that the behaviour Kasparov noted had resulted from a glitch in the computer program. Plans for further engagement between Kasparov and IBM, including a rematch, did not come to fruition, due to the accusations of cheating.

In January 2003, he engaged in a six-game classical time control match, with a $1 million prize fund, against Deep Junior. It was billed as the FIDE "Man vs. Machine" world championship. The engine evaluated three million positions per second. After one win each and three draws, it was all up to the final game. After reaching a decent position, Kasparov offered a draw, which was accepted by the Deep Junior team. Asked why he had offered the draw, Kasparov said he feared making a blunder. Deep Junior was the first machine to beat Kasparov with Black and at a standard time control.

In June 2003, Mindscape released the computer game Kasparov Chessmate, with Kasparov himself listed as a co-designer. In November 2003, he engaged in a four-game match against the computer program X3D Fritz, using a virtual board, 3D glasses and a speech recognition system. After two draws and one win apiece, the X3D Man–Machine match ended in a draw. Kasparov received $175,000 and took home a golden trophy. He continued to regret the blunder in the second game that cost him a crucial point. He felt that he had outplayed the machine overall and performed well: "I only made one mistake but unfortunately that one mistake lost the game."

In 2021, Kasparov promoted a series of 32 NFTs that detailed important moments in his career. The top four sold for more than $11,000.

Early political activities
Kasparov's grandfather was a staunch communist, but the young Kasparov gradually began to have doubts about the Soviet Union's political system at age 13 when he travelled abroad for the first time in 1976 to Paris for a chess tournament. In 1981, at age 18, he read Aleksandr Solzhenitsyn's The Gulag Archipelago, a copy of which he bought while abroad. Nevertheless, Kasparov joined the Communist Party of the Soviet Union (CPSU) in 1984, and was elected to the Central Committee of Komsomol in 1987. In 1990, he left the party.

In May 1990, Kasparov took part in the creation of the Democratic Party of Russia. He left the party on 28 April 1991, after its conference. Kasparov was also involved with the creation of the "Choice of Russia" bloc of parties in June 1993. He took part in the election campaign of Boris Yeltsin in 1996. In 2001 he voiced his support for the Russian television channel NTV.

After his retirement from chess in 2005, Kasparov turned to politics and created the United Civil Front, a social movement whose main goal is to "work to preserve electoral democracy in Russia". He has vowed to "restore democracy" to Russia by restoring the rule of law. A year later the United Civil Front became part of The Other Russia. Kasparov was instrumental in setting up this coalition, which opposes Putin's government and the United Russia party. The Other Russia was boycotted by the leaders of Russia's mainstream opposition parties, Yabloko and Union of Right Forces, due to its inclusion of both nationalist and radical groups. Kasparov has criticised these two parties as being secretly under the auspices of the Kremlin.

In April 2005, Kasparov was in Moscow at a promotional event when he was struck over the head with a chessboard he had just signed. The assailant was reported to have said: "I admired you as a chess player, but you gave that up for politics" immediately before the attack. Kasparov has been the subject of a number of other episodes since, including police brutality and alleged harassment from the Russian secret service.

Kasparov helped organise the Saint Petersburg Dissenters' March on 3 March 2007 and The March of the Dissenters on 24 March 2007, both involving several thousand people rallying against Putin and Saint Petersburg Governor Valentina Matviyenko.

Kasparov led a pro-democracy demonstration in Moscow in April 2007. Soon after it started, however, over 9,000 police descended on the group and seized almost everyone. Kasparov, who was briefly arrested, was warned by the prosecution office on the eve of the march that anyone participating risked being detained. He was held for some ten hours and then fined and released. He was later summoned by the FSB for violations of Russian anti-extremism laws.

Speaking about Kasparov in 2007, former KGB defector Oleg Kalugin remarked: "I do not talk in details – people who knew them are all dead now because they were vocal, they were open. I am quiet. There is only one man who is vocal and he may be in trouble: world chess champion Kasparov. He has been very outspoken in his attacks on Putin and I believe that he is probably next on the list."

Presidential candidate (2008)
On 30 September 2007, Kasparov entered the Russian presidential race, receiving 379 of 498 votes at a congress held in Moscow by The Other Russia. In October 2007, Kasparov announced his intention of standing for the Russian presidency as the candidate of the "Other Russia" coalition and vowed to fight for a "democratic and just Russia". Later that month he travelled to the United States, where he appeared on several popular television programmes.

In November 2007, Kasparov and other protesters were detained by police at an Other Russia rally in Moscow, which drew 3,000 demonstrators to protest against election rigging. Following an attempt by about 100 protesters to march through police lines to the electoral commission, which had barred Other Russia candidates from parliamentary elections, arrests were made. The Russian authorities stated a rally had been approved but not any marches, resulting in several demonstrators being detained. Kasparov was subsequently charged with resisting arrest and organising an unauthorised protest, and was given a jail sentence of five days. Kasparov appealed the charges, citing that he had been following orders given by the police. He was released from jail on 29 November. Putin castigated Kasparov at the rally for his use of English when speaking rather than Russian.

In December 2007, Kasparov announced that he had to withdraw his presidential candidacy due to inability to rent a meeting hall where at least 500 of his supporters could assemble. With the deadline expiring on that date, he explained it was impossible for him to run. Russian election laws required sufficient meeting hall space for assembling supporters. Kasparov's spokeswoman accused the government of using pressure to deter anyone from renting a hall for the gathering and said that the electoral commission had rejected a proposal that would have allowed for smaller gathering sizes rather than one large gathering at a meeting hall.

Opposition to Putin administration (2010–2013)
Kasparov was among the 34 first signatories and a key organiser of the online anti-Putin campaign "Putin must go", started on 10 March 2010. Within the text is a call to Russian law enforcement to ignore Putin's orders. By June 2011, there were 90,000 signatures. While the identity of the petition author remained anonymous, there was wide speculation that it was indeed Kasparov. On 31 January 2012, Kasparov hosted a meeting of opposition leaders planning a mass march on 4 February 2012, the third major opposition rally held since the disputed State Duma elections of December 2011. Among other opposition leaders attending were Alexey Navalny and Yevgeniya Chirikova.

Kasparov was arrested and beaten outside a Moscow court on 17 August 2012 while attending sentencing in the case involving the all-female punk band Pussy Riot. On 24 August, he was cleared of charges that he had taken part in an unauthorised protest against the conviction of three members of the band. Judge Yekaterina Veklich said there were "no grounds to believe the testimony of the police". Kasparov later thanked all the bloggers and reporters who provided video evidence that contradicted the testimony of the police. Kasparov wrote in February 2013 that "fascism has come to Russia. ...Project Putin, just like the old Project Hitler, is but the fruit of a conspiracy by the ruling elite. Fascist rule was never the result of the free will of the people. It was always the fruit of a conspiracy by the ruling elites!"

Kasparov denied rumours in April 2013 that he was planning to leave Russia for good. "I found these rumors to be deeply saddening and, moreover, surprising," he wrote. "I was unable to respond immediately because I was in such a state of shock that such an incredibly inaccurate statement, the likes of which is constantly distributed by the Kremlin's propagandists, came this time from Ilya Yashin, a fellow member of the Opposition Coordination Council (KSO) and my former colleague from the Solidarity movement." He also accused prominent Russian journalist Vladimir Posner of failing to stand up to Putin and to earlier Russian and Soviet leaders.

However, Kasparov subsequently fled Russia less than three months later. On 6 June 2013, he announced that he had left his homeland on account of fear of persecution for his political views. Further, at the 2013 Women in the World conference, Kasparov told The Daily Beast's Michael Moynihan that democracy no longer existed in what he called Russia's "dictatorship".

Opposition to Putin from exile (2013–)
Kasparov said at a press conference in June 2013 that if he returned to Russia, he doubted he would be allowed to leave again, given Putin's ongoing crackdown on dissenters. "So for the time being," he said, "I refrain from returning to Russia." He explained shortly thereafter in an article for The Daily Beast that this had not been intended as "a declaration of leaving my home country, permanently or otherwise", but merely an expression of "the dark reality of the situation in Russia today, where nearly half the members of the opposition's Coordinating Council are under criminal investigation on concocted charges". He noted that the Moscow prosecutor's office was "opening an investigation that would limit my ability to travel", making it impossible for him to fulfil "professional speaking engagements" and hindering his "work for the non-profit Kasparov Chess Foundation, which has centres in New York City, Brussels and Johannesburg, to promote chess in education". Kasparov further wrote in his June 2013 Daily Beast article that the mass protests in Moscow 18 months earlier against fraudulent Russian elections had been "a proud moment for me". He recalled that after joining the opposition movement in March 2005, he had been criticised for seeking to unite "every anti-Putin element in the country to march together regardless of ideology". Therefore, the sight of "hundreds of flags representing every group from liberals to nationalists all marching together for 'Russia Without Putin' was the fulfillment of a dream." Yet most Russians, he lamented, had continued to "slumber" even as Putin had "taken off the flimsy mask of democracy to reveal himself in full as the would-be KGB dictator he has always been".

Kasparov responded with several Twitter postings to a September 2013 The New York Times op-ed by Putin. "I hope Putin has taken adequate protections," he tweeted. "Now that he is a Russian journalist his life may be in grave danger!" Also: "Now we can expect NY Times op-eds by Mugabe on fair elections, Castro on free speech, & Kim Jong-un on prison reform. The Axis of Hypocrisy."

Kasparov wrote in July 2013 about the trial in Kirov of fellow opposition leader Navalny, who had been convicted "on concocted embezzlement charges", only to see the prosecutor, surprisingly, ask for his release the next day pending appeal. "The judicial process and the democratic process in Russia," wrote Kasparov, "are both elaborate mockeries created to distract the citizenry at home and to help Western leaders avoid confronting the awkward fact that Russia has returned to a police state". Still, Kasparov felt that whatever had caused the Kirov prosecutor's about-face, "my optimism tells me it was a positive sign. After more than 13 years of predictable repression under Putin, anything different is good."

Kasparov has been outspoken regarding Putin's antigay laws, describing them as "only the most recent encroachment on the freedom of speech and association of Russia's citizens", which the international community had largely ignored. Regarding Russia's hosting of the 2014 Winter Olympics, Kasparov explained in August 2013 that he had opposed Russia's bid from the outset, since it would "allow Vladimir Putin's cronies to embezzle hundreds of millions of dollars" and "lend prestige to Putin's authoritarian regime". Kasparov did not support the proposed Sochi Olympics boycott—writing that it would "unfairly punish athletes"—but called for athletes and others to "transform Putin's self-congratulatory pet project into a spotlight that exposes his authoritarian rule" to the world. In September, Kasparov called upon politicians to refuse to attend the games and the public to pressure sponsors and the media, such that Coca-Cola, for example, could put "a rainbow flag on each Coca-Cola can" and NBC could "do interviews with Russian gay activists or with Russian political activists". Kasparov also emphasised that although he was "still a Russian citizen", he had "good reason to be concerned about my ability to leave Russia if I returned to Moscow".

Kasparov spoke out against the 2014 Russian annexation of Crimea and has stated that control of Crimea should be returned to Ukraine after the overthrow of Putin without additional conditions. Kasparov's website was blocked by the Russian government censorship agency, Roskomnadzor, at the behest of the public prosecutor, allegedly due to Kasparov's opinions on the Crimean crisis. Kasparov's block was made in unison with several other notable Russian sites that were accused of inciting public outrage. Reportedly, several of the blocked sites received an affidavit noting their violations. However, Kasparov stated that his site had received no such notice of violations after its block. In 2015, a whole note on Kasparov was removed from a Russian language encyclopaedia of greatest Soviet players after an intervention from "senior leadership".

In October 2015, Kasparov published a book titled Winter Is Coming: Why Vladimir Putin and the Enemies of the Free World Must Be Stopped. In the book, Kasparov likens Putin to Adolf Hitler and explains the need for the West to oppose Putin sooner, rather than appeasing him and postponing the eventual confrontation. According to his publisher, "Kasparov wants this book out fast, in a way that has potential to influence the discussion during the primary season." In 2018, he said that "anything is better than Putin because that eliminates the probability of a nuclear war. Putin is insane."

Following reports of Russian ransomware attacks against American agencies and companies in 2021, Kasparov stated that "the only language that Putin understands is power, and his power is his money," arguing that the United States should target the bank accounts of Russian oligarchs to force Russia to rein in its criminals' cyberattacks.

Kasparov spoke out against the invasion of Ukraine by Russia on Twitter: "The only way this really ends is the fall of Putin's regime by collapse of Russian economy and defeat in Ukraine." He also believed that "pressure must be kept up" in terms of sanctions and condemnations against Russia's actions and joined with other prominent Russian figures-in-exile to form the Anti-War Committee of Russia. He said that Russia should be "thrown back into the Stone Age to make sure that the oil and gas industry and any other sensitive industries that are vital for survival of the regime cannot function without Western technological support."

On 20 May 2022, Kasparov was designated as "foreign agent" by the Ministry of Justice of the Russian Federation.

In May 2023, along with a large group of fellow exiles, Kasparov participated in the drafting of Mikhail Khodorkovsky's "Declaration of Russia's Democratic Forces".

On August 4, 2023, Kasparov participated on the radio show Open to Debate in a debate against Charles Kupchan, where he argued for Ukrainian admission into NATO and against any form of appeasement towards Putin.

In March 2024, Russia placed Kasparov on its list of "terrorists and extremists."

On 24 April, 2024 an arrest warrant was issued by a court in Russia's Komi region charging Kasparov of creating and leading a "terrorist" group.

United States
Kasparov received the Keeper of the Flame award in 1991 from the Center for Security Policy, a Washington, D.C.-based far-right, anti-Muslim think tank. In his acceptance speech Kasparov lauded the defeat of communism while also urging the United States to give no financial assistance to central Soviet leaders. Kasparov gave speeches at other think tanks such as the Hoover Institution.

In a 12 May 2013 op-ed for The Wall Street Journal, Kasparov questioned reports that the Russian security agency, the FSB, had fully cooperated with the FBI in the matter of the Boston bombers. He noted that the elder bomber, Tamerlan Tsarnaev, had reportedly met in Russia with two known jihadists who "were killed in Dagestan by the Russian military just days before Tamerlan left Russia for the U.S." Kasparov argued, "If no intelligence was sent from Moscow to Washington" about this meeting, "all this talk of FSB cooperation cannot be taken seriously." He further observed, "This would not be the first time Russian security forces seemed strangely impotent in the face of an impending terror attack," pointing out that in both the 2002 Moscow theater siege and the 2004 Beslan school attack, "there were FSB informants in both terror groups – yet the attacks went ahead unimpeded." Given this history, he wrote, "it is impossible to overlook that the Boston bombing took place just days after the U.S. Magnitsky List was published, creating the first serious external threat to the Putin power structure by penalising Russian officials complicit in human-rights crimes." In sum, Putin's "dubious record on counterterrorism and its continued support of terror sponsors Iran and Syria mean only one thing: common ground zero".

In the 2016 United States presidential election, Kasparov described Republican Donald Trump as "a celebrity showman with racist leanings and authoritarian tendencies" and criticised him for calling for closer ties with Putin. After Trump's running mate, Mike Pence, called Putin a strong leader, Kasparov said that Putin is a strong leader "in the same way arsenic is a strong drink". He also disparaged the economic policies of Democratic primary candidate Bernie Sanders, but showed respect for Sanders as "a charismatic speaker and a passionate believer in his cause". Kasparov opined that Henry Kissinger "was selling the Trump Administration on the idea of a mirror of 1972 [Richard Nixon's visit to China], except, instead of a Sino-U.S. alliance against the U.S.S.R., this would be a Russian-American alliance against China."

Armenia
In a 2020 interview discussing the Nagorno-Karabakh conflict, Kasparov stated that the Republic of Artsakh has a right to independence and that Azerbaijan has no sovereign right over it. He considers this stance to be objective and without bias, as Soviet law allowed for autonomous republics (such as the Nagorno-Karabakh Autonomous Oblast) to vote for independence separately and were given an equal right for self-determination, a factor he felt often went ignored. Kasparov recalled that he was criticised by Armenians for not taking a strong stance when the Karabakh movement began in 1988, explaining that he was living in Baku with 200,000 other Armenians at the time and did not want to increase tensions. Kasparov and his family later fled Baku in January 1990 to escape pogroms against Armenians. Kasparov has declined invitations back to visit Baku, stating he would only return "if every other Armenian born there can do it without a problem and without special favors from the government."

He welcomed the Velvet Revolution in Armenia in 2018. Kasparov supports Armenian genocide recognition.

Other international affairs
During the Yugoslav Wars, Kasparov advocated for the Western world to destroy the Yugoslav People's Army and accused Slobodan Milošević of creating a "siege mentality" to maintain control over Serbia. In 1997, he was awarded honorary citizenship of Bosnia and Herzegovina for his support of Bosnian people during the Bosnian War. Kasparov was named Chairman of the Human Rights Foundation in 2011; he served in this position until 2024, being succeeded by Yulia Navalnaya. In addition, Kasparov was presented with the Morris B. Abram Human Rights Award, UN Watch's annual human-rights prize, in 2013. The organisation praised him as "not only one of the world's smartest men" but "also among its bravest".

Before the first Gulf War, Kasparov expressed an unconventional viewpoint, recommending the United States to consider the use of an atomic bomb against Saddam Hussein in Iraq. In 2002, supporting military action against Iraq, he also recommended planning for military action against Iran, Syria and Saudi Arabia.

In April 2013, Kasparov joined in an HRF condemnation of Kanye West for having performed for the leader of Kazakhstan in exchange for a payment of $3 million, saying that West "has entertained a brutal killer and his entourage" and that his fee "came from the loot stolen from the Kazakhstan treasury". Further, in September 2013, Kasparov wrote in Time magazine that in Syria, Putin and Bashar al-Assad "won by forfeit when President Obama, Prime Minister Cameron and the rest of the so-called leaders of the free world walked away from the table." Kasparov lamented the "new game at the negotiating table where Putin and Assad set the rules and will run the show under the protection of the U.N." Kasparov said in September 2013 that Russia was now a dictatorship. In the same month he told an interviewer that "Obama going to Russia now is dead wrong, morally and politically," because Putin's regime "is behind Assad".

Kasparov was critical of the violence unleashed by the Spanish police against the 2017 independence referendum in Catalonia and accused the Spanish PM Mariano Rajoy of "betraying" the European promise of peace. After the Catalan regional election held later the same year, Kasparov wrote: "Despite unprecedented pressure from Madrid, Catalonian separatists won a majority. Europe must speak and help find a peaceful path toward resolution and avoid more violence". Kasparov recommended that Spain look to how Britain handled the 2014 Scottish independence referendum, adding: "look only at how Turkey and Iraq have treated the separatist Kurds. That cannot be the road for Spain and Catalonia."

On the occasion of the 2015 centennial of the Armenian genocide, Kasparov reflected that in 2002 he had called for Turkey to be admitted to the European Union if Turkey recognised the genocide. He condemned the assassination of Saudi journalist Jamal Khashoggi. In October 2018, Kasparov wrote that President Erdoğan's regime in Turkey "has jailed more journalists than any country in the world and scores of them remain in prison in Turkey. Since 2016, Turkey's intelligence agency has abducted at least 80 people in operations in 18 countries."

The BBC Series Rise of the Nazis of February 2022 featured Kasparov's views on Soviet leader Josef Stalin, "a ruthless dictator"; Kasparov noted Stalin's admiration for Hitler in 1940.

In the wake of the 2023 Israel-Hamas war, Kasparov vigorously called on the Biden administration for the destruction of Hamas and Hezbollah. He further demanded the US to set up regime change in Russia and Iran.

Croatian citizenship
Kasparov had maintained a summer home in the Croatian city of Makarska. In February 2014, he applied for citizenship by naturalisation in Croatia, according to media reports, claiming he was finding it increasingly difficult to live in Russia. According to an article in The Guardian, Kasparov was "widely perceived" as having been a vocal supporter of Croatian independence during the early 1990s. Later in February 2014, his application for naturalisation was approved and he had a meeting with Croatian prime minister Zoran Milanović on 27 February. Croatian press cited his "lobbying for Croatia in 1991" as grounds for the expedited naturalisation. In an interview for a Croatian daily published in February 2022, Kasparov said he was "very grateful" to Milanović for the help rendered by him (then as prime minister) in obtaining Croatian citizenship.

Early writings
Kasparov has written books on chess. He published a controversial autobiography when still in his early 20s. Originally entitled Child of Change, it was later published as Unlimited Challenge. This book was updated several times after he became world champion. Its content is mainly literary, with a small chess component of key unannotated games. He published an annotated games collection in 1983, Fighting Chess: My Games and Career, which has been updated in further editions. He also wrote a book annotating the games from his World Chess Championship 1985 victory, World Chess Championship Match: Moscow, 1985.

He has annotated his own games extensively for the Yugoslav Chess Informant series. In 1982, he co-authored Batsford Chess Openings with British grandmaster Keene. That book sold well and was updated in a second edition in 1989. He also co-authored two opening books with his trainer Alexander Nikitin in the 1980s for British publisher Batsford – on the Classical Variation of the Caro–Kann Defence and on the Scheveningen Variation of the Sicilian Defence. Kasparov also contributed extensively to the five-volume openings series Encyclopedia of Chess Openings from Chess Informant, for which Kasparov also wrote personal columns called Garry's Choice.

In 2000, Kasparov co-authored Kasparov Against the World: The Story of the Greatest Online Challenge with grandmaster Daniel King. The 202-page book analyses the 1999 Kasparov versus the World game, and holds the record for the longest analysis devoted to a single chess game.

My Great Predecessors series
In 2003, the first volume of his five-volume work Garry Kasparov on My Great Predecessors was published. This volume deals with world champions Wilhelm Steinitz, Emanuel Lasker, Capablanca and Alekhine, and some of their strong contemporaries. It won the British Chess Federation's Book of the Year award in 2003. Volume two, covering Max Euwe, Botvinnik, Smyslov and Tal, appeared later in 2003. Volume three, featuring Tigran Petrosian and Boris Spassky, was published in early 2004. In December 2004, Kasparov released volume four, which covers Samuel Reshevsky, Miguel Najdorf and Bent Larsen (none of whom was world champion), but focuses on Fischer. The fifth volume, devoted to the chess careers of world champion Karpov and challenger Korchnoi, was published in March 2006.

Modern Chess series
His Revolution in the 70s (published in March 2007) covers "the openings revolution of the 1970s–1980s" and was the first work in a new venture, "Modern Chess Series", which recounted his matches with Karpov and selected games. Revolution in the 70s is about the development of opening theory witnessed in that decade. Systems like the novel "Hedgehog" opening plan of passively developing the pieces no further than the first three ranks were examined in great detail. Kasparov also analysed some of the most notable games played in that period. In a section at the end of the book, top opening theoreticians provided their opinion on progress made in opening theory in the 1980s.

Garry Kasparov on Garry Kasparov series
From 2011–14, Kasparov published a three-volume series of his games, spanning his career in three eras until he stopped playing full time in 2005.

Winter Is Coming
In October 2015, Kasparov published a book titled Winter Is Coming: Why Vladimir Putin and the Enemies of the Free World Must Be Stopped. The title is a reference to the HBO television series Game of Thrones. In the book, Kasparov writes about the need for an organisation composed solely of democratic countries to replace the United Nations. In an interview, he called the United Nations a "catwalk for dictators".

Historical revision
Kasparov believes that the conventional history of civilisation is incorrect. Specifically, he contends that the history of ancient civilisations is based on misdating of events and achievements that occurred in the medieval period. He has cited several aspects of ancient history that, he argues, are likely to be anachronisms.

Kasparov has written in support of the pseudohistorical New Chronology (Fomenko), although with some reservations. In 2001, he expressed a desire to devote his time to promoting the New Chronology after his chess career. "New Chronology is a great area for investing my intellect ... My analytical abilities are well placed to figure out what was right and what was wrong." "When I stop playing chess, it may well be that I concentrate on promoting these ideas... I believe they can improve our lives." Later, Kasparov renounced his support of Fomenko theories but reaffirmed his belief that mainstream historical knowledge is inconsistent.

Other post-retirement writing
Kasparov wrote How Life Imitates Chess, an examination of the parallels between decision-making in chess and in the business world, in 2007. In 2008, Kasparov published a sympathetic obituary for Fischer: "I am often asked if I ever met or played Bobby Fischer. The answer is no, I never had that opportunity. But even though he saw me as a member of the evil chess establishment that he felt had robbed and cheated him, I am sorry I never had a chance to thank him personally for what he did for our sport."

Kasparov is the chief advisor for the book publisher Everyman Chess. He works closely with Mig Greengard and his comments can often be found on Greengard's blog. Kasparov collaborated with Max Levchin and Peter Thiel on The Blueprint, a book calling for a revival of world innovation, planned for release in March 2013 but cancelled after the authors disagreed on its contents. In an editorial comment on Google's AlphaZero chess-playing system, Kasparov argued that chess has become the model for reasoning in the same way that the fruit fly Drosophila melanogaster became a model organism for geneticists: "I was pleased to see that AlphaZero had a dynamic, open style like my own," he wrote in late 2018.

Kasparov served as a consultant for the 2020 Netflix miniseries The Queen's Gambit and gave an interview to Slate on his contributions. That same year, Kasparov collaborated with Matt Calkins, founder and CEO of Appian, on HYPERAUTOMATION, a book about low-code development and the future of business automation. Kasparov wrote the foreword where he discusses his experiences with human–machine relationships. The New York Times published an essay by Kasparov titled "Garry Kasparov: What We Believe About Reality" in 2021. The essay is part of a series called The Big Ideas: What Do We Believe. This work was later published in a compendium titled Question Everything: A Stone Reader.

Videos

 * Kasparov, Garry, Nigel Short, Raymond Keene and Daniel King. 1993. Kasparov Short The Inside Story. Grandmaster Video.
 * Kasparov, Garry, Jonathan Tisdall and Jim Plaskett. 2000. My Story. Grandmaster Video.
 * Kasparov, Garry. 2004. How to Play the Queen's Gambit. Chessbase. ISBN 978-3-937549-06-4
 * Kasparov, Garry. 2005. How to Play the Najdorf. Chessbase. vol. 1 ISBN 978-3-937549-25-5, vol. 2 ISBN 978-3-937549-78-1
 * Kasparov, Garry. 2012. How I Became World Champion 1973–1985. Chessbase. ISBN 978-3-86681-341-0
 * Kasparov, Garry. 2017. Garry Kasparov Teaches Chess. Masterclass.com.
 * Kasparov, Garry. 2022. Stand with Ukraine in the fight against evil, Ted Talk.

Personal life
Kasparov has lived in New York City since 2013.

He has been married three times: to Masha, with whom he had a daughter, Polina, before divorcing; to Yulia, with whom he had a son, Vadim, before their 2005 divorce; and to Daria (Dasha), with whom he has two children, daughter Aida born in 2006 and son Nickolas born in 2015. Kasparov's wife manages his business activities worldwide through Kasparov International Management Inc.

title: Garry Kasparov