26 Bf4-c7!! as 27 Qe1-e5 gains time for c7 with g7-mate threat Spassky vs O Averkin, 1973  (B44) Sicilian, 35 moves, 1-0 40 Bd3-g6+! White f4-pawn has Black e6-rook tactical target Larsen vs J Penrose, 1969  (A01) Nimzovich-Larsen Attack, 44 moves, 1-0 13 ... Bc6xd5! Black g8-knight has White e4-knight target B Petri vs Larsen, 1953  (C34) King's Gambit Accepted, 38 moves, 0-1 11 d4-d5! White c3-queen has Black e8-king tactical target I Kurnosov vs M Dzhumaev, 2008  (B07) Pirc, 15 moves, 1-0 4 games