There are so many natural moves by Bot. Ragozin vs Botvinnik, 1940  (D83) Grunfeld, Grunfeld Gambit, 41 moves, 0-1 Kashdan vs Reshevsky, 1942  (D82) Grunfeld, 4.Bf4, 39 moves, 0-1 J Bolbochan vs Najdorf, 1943 (D74) Neo-Grunfeld, 6.cd Nxd5, 7.O-O, 42 moves, 0-1 H W Russner vs C Walcker, 1942  (D85) Grunfeld, 30 moves, 0-1 M Dietze vs Keres, 1943 (D92) Grunfeld, 5.Bf4, 32 moves, 0-1 Lilienthal vs Boleslavsky, 1944  (D93) Grunfeld, with Bf4 & e3, 43 moves, 0-1 B Milic vs Gligoric, 1945  (D85) Grunfeld, 43 moves, 0-1 B Ratner vs Botvinnik, 1945  (D87) Grunfeld, Exchange, 38 moves, 0-1 Botvinnik vs Smyslov, 1954  (E67) King's Indian, Fianchetto, 33 moves, 0-1 9 games