Douglas Griffin on X: Karpov-Korchnoi, 18th match-game, FIDE Candidates' final, Moscow 1974. (Source: TASS, photographer: V. Savostianov.) #chess / X

Douglas Griffin on X: Karpov-Korchnoi, 18th match-game, FIDE Candidates' final, Moscow 1974. (Source: TASS, photographer: V. Savostianov.) #chess / X

Douglas Griffin on X: The @FIDE_chess Candidates quarter-final between Viktor Korchnoi (Switzerland) & Tigran Petrosian (USSR), Velden am Wörthersee (Austria), March 1980. #1, #2 The match in progress; #3 Petrosian & wife

Douglas Griffin on X: The Polish on-line archive ( indicates that this game was played in Berlin, but from the position on the board and the tournament records, it seems to be

Douglas Griffin on X: The 13-year-old Garry Kasparov - already USSR Under- 18 champion - pictured in play at the Khalilbeyli Memorial tournament in Baku, Soviet Azerbaijan, May-June 1976. (Photo credit: V. Kalinin

Douglas Griffin on X: Moscow, 2nd July 1968. Viktor Korchnoi and Mikhail Tal are pictured in analysis of the 4th game of their Candidate's Semi-final match, as Semyon Furman looks on. (📷

Douglas Griffin on X: Wijk aan Zee, 19th January 1968. Viktor Korchnoi faces Mikhail Tal in what proved to be the last of eight(!) successive victories at the start of this 15-round

Douglas Griffin on X: At the FIDE Interzonal in Moscow, 1982. Round 11, 21st September. Guillermo García Gonzáles faces ex-World Champion Mikhail Tal. The Cuban grandmaster started this event with 6½/8. (Photo

Douglas Griffin on X: USSR, April 1975. The newly-crowned World Champion Anatoly Karpov is pictured at the chessboard with his father, Evgeny. (📷D. Donskoi, Novosti Press.) #chess / X

Douglas Griffin on X: Leningrad, 12th November 1975. In the traditional 'GMs v Young Pioneers' event, the 12-year-old Garry Kasparov, representing his home city of Baku, is pictured in a clock-simultaneous display

Douglas Griffin on X: The 1981 World Championship match between champion Anatoly Karpov (USSR) & challenger Viktor Korchnoi (Switzerland), Merano, October-November 1981. (📷J. Cooke, V. Rastelli / Corbis.) #chess / X

Douglas Griffin on X: Amsterdam, 26th May 1981. World Champion Anatoly Karpov (USSR) is pictured in play v. Kick Langeweg (Netherlands) in the 9th round of the IBM tournament. (Photo: M. Antonisse /

Douglas Griffin on X: London, November 1983. At the FIDE Candidates' Semi-final match, Garry Kasparov faces Viktor Korchnoi; talking to Korchnoi is Svetozar Gligorić, one of the match arbiters. (Photo credit: unknown