Mikhail Botvinnik vs Tigran Vartanovich Petrosian - Botvinnik - Petrosian World Championship Match 1963.04.24
Mikhail Botvinnik vs Tigran Vartanovich Petrosian
Botvinnik - Petrosian World Championship Match Moscow URS round 14 1963.04.24
Queen’s Gambit Declined: Alapin Variation 1-0