31 ... Rc8xc2!! possible due to undefended White d2-,e1-rooks Anand vs Kasparov, 1995  (B78) Sicilian, Dragon, Yugoslav Attack, 10.castle long, 31 moves, 0-1 28 .. Qg5-d8 makes Black c1-rook loose and basis for queen fork Carlsen vs Dominguez Perez, 2007  (B92) Sicilian, Najdorf, Opocensky Variation, 42 moves, 1-0 64 .. Qg3xe3+!! undefended White c6-queen allows this queen sac Petrosian vs B Larsen, 1966  (A16) English, 61 moves, 0-1 39 Rh8xh6+!! stunning sac thanks to undefended Black f3-queen Bronstein vs Korchnoi, 1962  (C83) Ruy Lopez, Open, 39 moves, 1-0 13 Rh1xh7! undefended Black e6-bishop make combination possible Seirawan vs M Wiedenkeller, 1979  (A17) English, 36 moves, 1-0 34 Qe2xg4! undefended Black c8-rook makes discovery possible Anand vs Kasparov, 1996  (B90) Sicilian, Najdorf, 54 moves, 1-0 39 Be2xh5! g6xh5 loose Black g8-rook means White e-passer wins Kasparov vs Bacrot, 2000  (C45) Scotch Game, 39 moves, 1-0 18 ... Ng6xe5! grabs pawn due to undefended e4-knight,e3-bishop Radjabov vs Topalov, 2008  (C67) Ruy Lopez, 41 moves, 1/2-1/2 32 ... Bh3xg2+! made possible by undefended White d4-knight Ftacnik vs Seirawan, 1990  (D02) Queen's Pawn Game, 32 moves, 0-1 12 h2-h3? Nf6xe4! made possible by undefended White f4-bishop Uhlmann vs Fischer, 1970  (A65) Benoni, 6.e4, 34 moves, 0-1 27 Bc4-a6! made possible only by the undefended Black b6-bishop Radjabov vs Carlsen, 2008  (C65) Ruy Lopez, Berlin Defense, 43 moves, 1-0 19 Ne4-d6!! tactic fireworks based on undefended Black e6-queen Short vs Timman, 2008  (C67) Ruy Lopez, 40 moves, 0-1 33 ... Re8-e6? undef e6-rook allows winning 35 Nb3-c5+ fork Tal vs K Klaman, 1957  (B61) Sicilian, Richter-Rauzer, Larsen Variation, 7.Qd2, 34 moves, 1-0 24 Qh7xh2+! combo based on undef Black queen over on b6(!)-sq A Stukopin vs B Hasenohr, 2008  (A07) King's Indian Attack, 25 moves, 1-0 20 Nd4-f3 dis attack based on threatening undef Black g5-bishop Kramnik vs Topalov, 2006  (E04) Catalan, Open, 5.Nf3, 38 moves, 1/2-1/2 28 Rc1xBc5! only made possible by the undefended Black h8-rook Tarrasch vs Janowski, 1896  (C25) Vienna, 32 moves, 1-0 28 Rc8-h8+! made possible only by the undefended Black d6-queen N Sakr vs Ali Atwi, 2001  (A10) English, 27 moves, 1-0 24 ... Qd8-d6? newly undefended queen makes 25 Ng5xf7! possible Nepomniachtchi vs Kharitonov, 2009  (B14) Caro-Kann, Panov-Botvinnik Attack, 48 moves, 1-0 18 Qf3xf7+! only made possible by the undefended Black c7-queen Nunn vs S Swanson, 1974  (B06) Robatsch, 18 moves, 1-0 31 .. Ra2xBd2! possible due to undef White e7-rook, fork threat Buhmann vs Shirov, 2008  (D12) Queen's Gambit Declined Slav, 31 moves, 0-1 47 Nb1-d2? Bd5xg2! 1-0 exploits newly loose White d2-knight Adams vs Radjabov, 2009  (B30) Sicilian, 47 moves, 0-1 16 ... Nd7xe5! based on pin against undefended White c2-queen So vs T S Nguyen, 2010  (A15) English, 26 moves, 1/2-1/2 I Krush vs S Khukhashvili, 2012  (A41) Queen's Pawn Game (with ...d6), 66 moves, 0-1 23 games