Petrosian vs Spassky, World Championship match 1966, Queen Sac

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Boris Spassky vs Tigran Petrosian • World Championship, 1966

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Europe Echecs on X: Tigran Vartanovich Petrosian (Տիգրան Պետրոսյան) June 17, 1929 – August 13, 1984 — « It is to Petrosian's advantage that his opponents never know when he is suddenly