18 a4-a5! e5xNd4?? 19 c3xd4 opens c-file, b8-h2 diag to c8-king Le Quang Liem vs Nepomniachtchi, 2010  (A35) English, Symmetrical, 60 moves, 1-0 36 ... Ng6-h4+! opens g-file to get at White g2-king defender Leko vs Grischuk, 2003  (C84) Ruy Lopez, Closed, 36 moves, 0-1 16 ... Nb6-c4!? 17 b3xNc4 opens b-file to undefended b2-bishop Ponomariov vs Anand, 2009  (D71) Neo-Grunfeld, 34 moves, 1/2-1/2 55 ... Rg6-g5+! forces open the h-file for 56 ... Ra3-h3# Carlsen vs Radjabov, 2009  (B40) Sicilian, 60 moves, 1/2-1/2 31 Re3xe5!, 33 d5-d6! forces open the a2-g8 diagonal to g8-king Karjakin vs Van Wely, 2007  (B90) Sicilian, Najdorf, 35 moves, 1-0 24 b4-b5! sacs pawn to open a-file and get at Black weaknesses Anand vs Y Wang, 2009  (D15) Queen's Gambit Declined Slav, 33 moves, 1-0 56 Rc6-c4+! opens a4-e8 diagonal to Black a4-king, 57 Bf3-c6# M Gurevich vs R Ovetchkin, 2007  (D11) Queen's Gambit Declined Slav, 54 moves, 1/2-1/2 38 ... Rb4-e4+!! opens d1-h5 diagonal to White e2-king, mating J Sherwin vs Fischer, 1957  (E87) King's Indian, Samisch, Orthodox, 41 moves, 1-0 30 ... Rf2-f4+! opens either e1-h4 diagonal or d8-h4 diagonal E M Jackson vs Marshall, 1899  (C24) Bishop's Opening, 30 moves, 0-1 38 ... Rf2-f4+! 39 g3xf4 opens g-file for skewer 39 ... Rh2-g2+ Teichmann vs Marshall, 1902  (C63) Ruy Lopez, Schliemann Defense, 39 moves, 0-1 27 h6-h7+! sacs pawn to open h-file for powerful king attack So vs R Gao, 2009  (B90) Sicilian, Najdorf, 32 moves, 1-0 25 ... g3-g2+! opens g-file so Black f6-rook can get at g2-sq Gelfand vs Nakamura, 2010  (E97) King's Indian, 33 moves, 0-1 20 - c5! opens b-file, get at White b2-bishop, b1-mating square Lautier vs Kasparov, 1997  (A34) English, Symmetrical, 20 moves, 1/2-1/2 57 ... Qe8-e3+! 58 Qf3xQe3 d4xQe3 opens a1-h8 for 59 .. Bg7xb2! V Papin vs I Kurnosov, 2011  (D76) Neo-Grunfeld, 6.cd Nxd5, 7.O-O Nb6, 70 moves, 0-1 14 games