25 Bf4-d6! exploits line up of White c1-rook vs Black c8-queen Petrosian vs Botvinnik, 1963  (A10) English, 52 moves, 1-0 14 Nc3-d5?! exploits line up of White e2-queen vs Black e8-king Petrosian vs Smyslov, 1959  (D29) Queen's Gambit Accepted, Classical, 39 moves, 0-1 25 Ng3-f5! exploits White e4-pawn vs Black g6-pawn, opens e-fil Yifan Hou vs Beliavsky, 2009  (C41) Philidor Defense, 39 moves, 1-0