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: 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: 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 Griffinστο X: Ex-World Champion Mikhail Tal (b. Riga, 1936; d. Moscow, 1992), pictured at Wijk aan Zee, January 1988. (📷: #chess / X

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: Four photos of the 19-year-old Garry Kasparov, pictured in play at the FIDE Interzonal tournament in Moscow, September 1982. Kasparov won this event with 10/13 (+7,-0,=6), thereby qualifying

Douglas Griffin on X: Some portraits from the Hoogovens tournament at Wijk aan Zee, January 1968, by the Dutch photographer E. Koch (ANEFO). Viktor Korchnoi & Mikhail Tal (USSR), Lajos Portisch (Hungary)

Douglas Griffin on X: Four photos of the 19-year-old Garry Kasparov, pictured in play at the FIDE Interzonal tournament in Moscow, September 1982. Kasparov won this event with 10/13 (+7,-0,=6), thereby qualifying

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: Yerevan, May/June 1989. The Petrosian Memorial tournament. Veteran grandmaster Svetozar Gligorić (Yugoslavia) faces Vladimir Akopian (USSR). (Photo source: personal archive of V. Akopian, via #chess

Douglas Griffin on X: The programme for the 1974 FIDE Candidates' final between grandmasters Anatoly Karpov & Viktor Korchnoi. The match took place in the Hall of Columns of the House of

Douglas Griffin on X: The 'Tournament of Peace', Rovinj/Zagreb, Yugoslavia, 1970. Bobby Fischer is seen in play in what would prove to be a theoretically important game v. Dragoljub Minić in the

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: Malta Olympiad 1980. USSR-USA match; top 2 boards Karpov (v. Alburt), Seirawan v. Tal. (Source: unknown.) #chess / X

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