42 ... Be4-c2+! White a2-rook defends a3-checking/mating square J Trevelyan vs F Jenni, 2005  (C68) Ruy Lopez, Exchange, 43 moves, 0-1 38 ... Rg5xe5! White e3-queen must defend f3-tactical base G Thomas vs Lasker, 1936  (D63) Queen's Gambit Declined, Orthodox Defense, 55 moves, 0-1 31 Rd1-d7! Black f7-queen defends the f6-checking focal point Hodgson vs M Hebden, 1986  (A45) Queen's Pawn Game, 36 moves, 1-0 22 ... Re8-e5!! White f5-queen must defend g4-checking square T Dao vs Kasparov, 2001  (E34) Nimzo-Indian, Classical, Noa Variation, 27 moves, 0-1 42 ... Bc5xe3!! White b3-queen must defend d1-checking square J Sunye Neto vs Kasparov, 1981  (D32) Queen's Gambit Declined, Tarrasch, 47 moves, 0-1 12 Bc4xf7+! Black d7-queen prevents check on d6 from e4-knight Mamedyarov vs G Ginsburg, 2007  (D32) Queen's Gambit Declined, Tarrasch, 21 moves, 1-0 29 Rg2-g5!! Black f5-queen must defend f7-square from Ne5-f7+ Aronian vs H Stefansson, 2004  (D45) Queen's Gambit Declined Semi-Slav, 40 moves, 1-0 11 Rc1xBc8! Black b8-queen stop b5-knight check on d6-square A Sokolsky vs G Krupsky, 1960  (A00) Uncommon Opening, 11 moves, 1-0 19 ... Rh8xh2! h1-rook defends g1-checking sq from b6-queen A Yusupov vs Caruana, 2008  (D12) Queen's Gambit Declined Slav, 33 moves, 0-1 26 Rd2xd6! Black d6-pawn chain base must defend the e5-square Shirov vs L D'Costa, 2008  (B42) Sicilian, Kan, 28 moves, 1-0 32 Rc8xNc6! Black c6-knight must defend the e5-checking square R Mamedov vs S Feller, 2008  (C10) French, 32 moves, 1-0 45 Qf7-f6+! Black h4-queen cannot defend h1-square and herself M Rodshtein vs B Amin, 2005  (A97) Dutch, Ilyin-Genevsky, 45 moves, 1-0 29 ... Qb6-b2!! White e2-queen must defend the d1-mating square O Bernstein vs Capablanca, 1914  (D63) Queen's Gambit Declined, Orthodox Defense, 29 moves, 0-1 34 Re1-e7! Black f7-queen must defend f5-checking square Fischer vs F Olafsson, 1960  (B52) Sicilian, Canal-Sokolsky (Rossolimo) Attack, 42 moves, 1-0 20 g2-g3?? weaken f3-checking square for 20 ... Qd5xf3+! 0-1 L Petovic vs A Chudinovskikh, 2009  (A46) Queen's Pawn Game, 20 moves, 0-1 22 Rb1xBb7! gets rid of both defenders of c8-checking square P Cramling vs B C Yildiz Kadioglu, 2009  (D21) Queen's Gambit Accepted, 22 moves, 1-0 26 Re1-e2! Black d2-queen must prevent White queen check on d6 Topalov vs Shirov, 2009  (D44) Queen's Gambit Declined Semi-Slav, 30 moves, 1/2-1/2 23 Rf1-f8+! Black d4-queen cannot defend both d4-,f8-check sq Motylev vs Shirov, 2009  (C48) Four Knights, 24 moves, 1-0 40 Rc8xNf8! destroys Black f8-knight defender of e6-checking sq Nakamura vs Carlsen, 2009  (D85) Grunfeld, 40 moves, 1-0 30 ... Qe3-c1+! White d1-queen cannot protect b3-,c1-chck sq Potkin vs Caruana, 2010  (D12) Queen's Gambit Declined Slav, 30 moves, 0-1 38 Qg6-h7+! Black g8-king cannot blockade g8, also protect h7 Carlsen vs Kramnik, 2010  (D39) Queen's Gambit Declined, Ragozin, Vienna Variation, 39 moves, 0-1 So vs N Nguyen, 2010  (A15) English, 26 moves, 1/2-1/2 Carlsen vs Nepomniachtchi, 2011  (B52) Sicilian, Canal-Sokolsky (Rossolimo) Attack, 40 moves, 1/2-1/2 23 games