Petrosian vs Spassky, 1969  (E47) Nimzo-Indian, 4.e3 O-O 5.Bd3, 38 moves, 1-0 Petrosian vs Bronstein, 1979  (E47) Nimzo-Indian, 4.e3 O-O 5.Bd3, 40 moves, 1-0 Petrosian vs Keres, 1952  (E53) Nimzo-Indian, 4.e3, 36 moves, 1-0 Petrosian vs Spassky, 1966  (E59) Nimzo-Indian, 4.e3, Main line, 41 moves, 1-0 Keres vs Spassky, 1965  (E43) Nimzo-Indian, Fischer Variation, 25 moves, 1-0 5 games