Board size 14 18 24 32 40 48 56 68 80

Bernstein Osip (FRA) - Botvinnik Mikhail (RUS), Groningen (Netherlands) It 1946 Ravinsky Grigory (RUS) - Simagin Vladimir (RUS), Moscow (Russia) Ch Moscow (match) 1947 Neikirch Oleg (BUL) - Bobotsov Milko G (BUL), Varna (Bulgaria) It 1960 Sisish V - Golubev M, Noyabrsk/Alushta 1997