Boris De Greiff vs Tigran Vartanovich Petrosian - Portoroz Interzonal 1958.08.06
Boris De Greiff vs Tigran Vartanovich Petrosian
Portoroz Interzonal Portoroz SLO round 2 1958.08.06
King’s Indian Defense: Petrosian Variation, Keres Defense 1/2-1/2
Boris De Greiff vs Tigran Vartanovich Petrosian
Portoroz Interzonal Portoroz SLO round 2 1958.08.06
King’s Indian Defense: Petrosian Variation, Keres Defense 1/2-1/2