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Andrey Andreyevich Markov was a Russian mathematician best known for his work on stochastic processes. A primary subject of his research later became known as the Markov chain. He was also a strong, close to master-level, chess player.
Tigran Vardani Petrosian was a Soviet-Armenian chess grandmaster and the ninth World Chess Champion from 1963 to 1969. He was nicknamed "Iron Tigran" due to his almost-impenetrable defensive playing style, which emphasized safety above all else. Petrosian is often credited with popularizing chess in Armenia.
Mikhail Nekhemyevich Tal was a Soviet and Latvian chess player and the eighth World Chess Champion. He is considered a creative genius and is widely regarded as one of the most influential players in chess history. Tal played in an attacking and daring combinatorial style. His play was known above all for improvisation and unpredictability. Vladislav Zubok said of him, "Every game for him was as inimitable and invaluable as a poem".
Mikhail Moiseyevich Botvinnik was a Soviet and Russian chess grandmaster who held five world titles in three different reigns. The sixth World Chess Champion, he also worked as an electrical engineer and computer scientist and was a pioneer in computer chess. He also had a mathematics degree (honorary).
Paul Keres was an Estonian chess grandmaster and chess writer. He was among the world's top players from the mid-1930s to the mid-1960s, and narrowly missed a chance at a World Chess Championship match on five occasions. As Estonia was repeatedly invaded and occupied during World War II, Keres was forced by the circumstances to represent the Soviet Union and Nazi Germany (1941–44) in international tournaments.
Mikhail Ivanovich Chigorin was a Russian chess player. He played two World Championship matches against Wilhelm Steinitz, losing both times. The last great player of the Romantic chess style, he also served as a major source of inspiration for the "Soviet chess school", which dominated the chess world in the middle and latter parts of the 20th century.
A game of chess can end in a draw by agreement. A player may offer a draw at any stage of a game; if the opponent accepts, the game is a draw. In some competitions, draws by agreement are restricted; for example draw offers may be subject to the discretion of the arbiter, or may be forbidden before move 30 or 40, or even forbidden altogether. The majority of draws in chess are by agreement.
Alexander Valeryevich Khalifman is a Russian chess player and writer. Awarded the title of Grandmaster by FIDE in 1990, he was FIDE World Chess Champion in 1999.
Several methods have been suggested for comparing the greatest chess players in history. There is agreement on a statistical system to rate the strengths of current players, called the Elo system, but disagreement about methods used to compare players from different generations who never competed against each other.
Pal Charles Benko was a Hungarian and American chess player, author, and composer of endgame studies and chess problems.
Mikhail Markovich Umansky was a Russian chess grandmaster of correspondence chess, who was the 13th ICCF World Champion in correspondence chess between 1989 and 1998. He was also USSR Correspondence Champion in 1978.
Mikhail Gurevich is a Soviet-born Belgian chess player. He was a top ten ranked player from 1989 to 1991. Gurevich became an International Grandmaster in 1986, and is currently an FIDE arbiter and senior trainer.
The fourth World Chess Championship was held in Havana from 1 January to 28 February 1892. Defending champion William Steinitz narrowly defeated challenger Mikhail Chigorin.
The World Blitz Chess Championship is a chess tournament held to determine the world champion in chess played under blitz time controls. Since 2012, FIDE has held an annual joint rapid and blitz chess tournament and billed it as the World Rapid & Blitz Chess Championships. The current world blitz champion is the Norwegian Grandmaster Magnus Carlsen. Valentina Gunina from Russia is the current women's blitz world champion. Magnus Carlsen has won the event a record seven times.
Mikhail Robertovich Kobalia is a Russian chess Grandmaster (1997).
Chessgames.com is an Internet chess community with over 224,000 members. The site maintains a large database of chess games, where each game has its own discussion page for comments and analysis. Limited primarily to games where at least one player is of master strength, the database begins with the earliest known recorded games and is updated with games from current top-level tournaments. Basic membership is free, and the site is open to players at all levels of ability, with additional features available for Premium members. Consultation games are periodically organized with teams of members playing either other teams of members or masters, including a former US champion and two former world correspondence champions.
The Chess World Cup 2013 was a 128-player single-elimination chess tournament, played between 11 August and 2 September 2013, in the hotel Scandic Tromsø in Tromsø, Norway. It was won by Vladimir Kramnik, who defeated Dmitry Andreikin 2½–1½ in the final match. The finalists qualified for the 2014 Candidates Tournament.
