Boris De Greiff vs Tigran Vartanovich Petrosian - Portoroz Interzonal 1958.08.06

Boris De Greiff vs Tigran Vartanovich Petrosian<br>Portoroz Interzonal Portoroz SLO round 2 1958.08.06<br>King's Indian Defense: Petrosian Variation, Keres Defense 1/2-1/2<br>https://www.chessgames.com/perl/chessgame?gid=1106395 --- Send in a voice message: https://anchor.fm/blindfoldchess/message