US grandmaster Fabiano Caruana during a match of the World Chess Candidates Tournament in Moscow.

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Chess players in the World Chess Candidates Tournament in Moscow.

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Israeli grandmaster Boris Gelfand, center, at the opening of the the World Chess Candidates Tournament in Moscow.

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Grandmaster Levon Aronyan of Armenia takes part in the World Chess Candidates Tournament in Moscow.

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Grandmaster Sergey Karyakin of Russia is seen here during the World Chess Candidates Tournament in Moscow.

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Grandmaster Hikaru Nakamura of the USA takes part in the World Chess Candidates Tournament in Moscow.

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From left in the foreground: Grandmaster Anish Giri of the Netherlands and Grandmaster Levon Aronyan of Armenia take part in the World Chess Candidates Tournament in Moscow.

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From left in the foreground: Grandmasters Anish Giri of the Netherlands and Levon Aronyan of Armenia take part in the World Chess Candidates Tournament in Moscow. From left in the background: Andrey Filatov, president of the Russian Chess Federation, FIDE vice president, emeritus academician of the Russian Academy of Arts; Armenian President Serzh Sargsyan, and FIDE President Kirsan Ilyumzhinov.

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Armenian President Serzh Sargsyan (second left) makes a first move at the opening of the World Chess Candidates Tournament in Moscow.

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Armenian President Serzh Sargsyan (left) and FIDE President Kirsan Ilyumzhinov seen here at the opening of the World Chess Candidates Tournament in Moscow.

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Grandmaster Anish Giri of the Netherlands takes part in the World Chess Candidates Tournament in Moscow.

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Grandmaster Sergey Karyakin of Russia is seen here during the World Chess Candidates Tournament in Moscow.

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Grandmaster Sergey Karyakin of Russia is seen here during the World Chess Candidates Tournament in Moscow.

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From left in the foregound: Grandmaster Anish Giri of the Netherlands and Grandmaster Levon Aronyan of Armenia take part in the World Chess Candidates Tournament in Moscow.

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From left: Grandmasters Viswanathan Anand of India and Veselin Topalov of Bulgaria take part in the World Chess Candidates Tournament in Moscow.

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Grandmaster Anish Giri of the Netherlands takes part in the World Chess Candidates Tournament in Moscow.

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Grandmaster Hikaru Nakamura of the USA takes part in the World Chess Candidates Tournament in Moscow.

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Grandmaster Levon Aronyan of Armenia takes part in the World Chess Candidates Tournament in Moscow.

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Grandmaster Pyotr Svidler of Russia takes part in the World Chess Candidates Tournament in Moscow.

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Grandmaster Pyotr Svidler of Russia takes part in the World Chess Candidates Tournament in Moscow.

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From left: Grandmasters Sergey Karyakin and Pyotr Svidler, both of Russia, take part in the World Chess Candidates Tournament in Moscow.

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Grandmaster Veselin Topalov takes part in the World Chess Candidates Tournament in Moscow.

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Grandmaster Sergey Karyakin of Russia is seen here during the World Chess Candidates Tournament in Moscow.

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Andrey Filatov, president of the Russian Chess Federation, FIDE vice president, honorary member of the Russian Academy of Arts, at a press conference on the World Chess Candidates Tournament in Moscow.

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Ilya Merenzon, president, World Chess by Agon Limited, speaks at a press conference on the World Chess Candidates Tournament in Moscow.

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Ilya Merenzon, president, World Chess by Agon Limited, at a press conference on the World Chess Candidates Tournament in Moscow.

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Ilya Merenzon (right), president, World Chess by Agon Limited; Andrey Filatov, president of the Russian Chess Federation, FIDE vice president, honorary member of the Russian Academy of Arts, attend a press conference on the World Chess Candidates Tournament in Moscow.

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