"Svidler pushed a few too many Pawns That Must Not Be Pushed" S Sjugirov vs Svidler, 2009  (B12) Caro-Kann Defense, 23 moves, 1-0 18 ... g7-g6 weakens the f6-square for royal fork 19 Nd5xf6+! A Nimzowitsch vs L Steiner, 1927   (C62) Ruy Lopez, Old Steinitz Defense, 21 moves, 1-0 23 ... c5-c4?? gives White d4-square, activates all his pieces Seirawan vs Kasparov, 1989  (E75) King's Indian, Averbakh, Main line, 43 moves, 1/2-1/2 20 ... Be7-g5! forces 21 e2-e3 and weakening of weak f3-square Kramnik vs Carlsen, 2008  (A30) English, Symmetrical, 57 moves, 0-1 38 f3-f4?? fatally weakens the e4-square for Black f6-knight Vaganian vs Short, 1989  (D35) Queen's Gambit Declined, 53 moves, 0-1 21 - h7-h6 weakens g6-square, gives White plan to force - f7-f6 Gelfand vs Eljanov, 2008  (A17) English, 38 moves, 1-0 15 ... g7-g6 weakens f6-square allowing possibility of Ne4-f6# Alekhine vs L Kussman, 1924   (D40) Queen's Gambit Declined, Semi-Tarrasch, 20 moves, 1-0 20 a2-a3? (Kasparov) fatally weakens the critical b3-square Fischer vs Geller, 1967  (B89) Sicilian, 23 moves, 0-1 39 f3-f4? permanently weakens the e4-square, allows 44 - Nc5-e4 Kramnik vs Topalov, 2006   (D47) Queen's Gambit Declined Semi-Slav, 52 moves, 0-1 42 ... a7-a6 weakens the b6-square for 43 Nc7-a8! 1-0 maneuver Leko vs Gelfand, 2009  (C42) Petrov Defense, 43 moves, 1-0 Anand vs Vaganian, 1995  (C10) French, 22 moves, 1-0 72 ... f6-f5?? invites White king into Black position via e5-sq Vachier-Lagrave vs Lenderman, 2009  (B12) Caro-Kann Defense, 89 moves, 1-0 19 e2-e4 weakens the f3-square, allowing a knight fork on f3 Smyslov vs Gligoric, 1959  (E61) King's Indian, 18 moves, 0-1 10 b2-b4? does not work with 4 Bf1-g2, weakening c4-sq too much J H Donner vs Fischer, 1966  (E67) King's Indian, Fianchetto, 28 moves, 0-1 20 ... e7-e6?! weakens d6-trapping square, allowing 21 Nf3-g5! McShane vs Wojtaszek, 2011  (B23) Sicilian, Closed, 38 moves, 1-0 32 a2-a4?? leaves behind b3-sq for 32 ... Qf7-b3+! Aronian vs Ivanchuk, 2011  (D37) Queen's Gambit Declined, 38 moves, 0-1 23 h2-h4? leaves behind g3-square for winning 23 ... Ne4-g3+!-+ Navara vs Grischuk, 2011  (B12) Caro-Kann Defense, 43 moves, 0-1 17 games