The position at move 51 (W to move) is interesting Portisch vs Botvinnik, 1969  (D96) Grunfeld, Russian Variation, 88 moves, 1/2-1/2 The position at move 52 (B to move) is interesting Suba vs Adorjan, 1987 (A30) English, Symmetrical, 64 moves, 1-0 The position at move 54 (B to move) is interesting Petrosian vs Pachman, 1962  (A07) King's Indian Attack, 63 moves, 1-0 The position at move 54 (B to move) is interesting Kosteniuk vs I Krush, 2023 (B53) Sicilian, 66 moves, 1-0 The position at move 48 (W to move) is interesting Polugaevsky vs Ftacnik, 1989 (D86) Grunfeld, Exchange, 63 moves, 0-1 The position at move 75 (B to move) is interesting A Kostiuchenko vs Y Sakharov, 1963 (A10) English, 79 moves, 1-0 The position at move 38 (W to move) is interesting Pilnik vs O Bernstein, 1951 (C65) Ruy Lopez, Berlin Defense, 60 moves, 0-1 The position at move 67 (B to move) is interesting B Grachev vs A Utegaliyev, 2024 (D12) Queen's Gambit Declined Slav, 69 moves, 1-0 The position at move 41 (B to move) is interesting N Kertaev vs Y Allam, 2024 (D10) Queen's Gambit Declined Slav, 61 moves, 1-0 The position at move 51 (W to move) is interesting Kataria Arun vs M Karthikeyan, 2024  (B32) Sicilian, 64 moves, 0-1 The position at move 58 (B to move) is interesting H Boshku vs T Yilmaz, 1990  (A88) Dutch, Leningrad, Main Variation with c6, 120 moves, 1/2-1/2 11 games