16 a2-a3?? takes away the a3-square, stalemating White b3-queen Gelfand vs Kamsky, 2011  (A15) English, 34 moves, 0-1 36 ... Bd8xh4?? blocks h4-sq, h5-Q trapped after 37 g3-g4! 1-0 Ivanchuk vs Vallejo-Pons, 2011  (A20) English, 37 moves, 1-0 34 ... Ra7-g7?? takes away g7-sq from Black h7-king S B Hansen vs Aronian, 2011  (C53) Giuoco Piano, 35 moves, 0-1 37 ... Be5-c7?? takes away c7-flight sq of b8-king, stalemate! Carlsen vs Gelfand, 2011  (D12) Queen's Gambit Declined Slav, 38 moves, 1-0 25 Rd1-d2?? White d6-queen now trapped by 25 ... Re8-e6! 0-1 Y Shulman vs B Savchenko, 2009  (E15) Queen's Indian, 25 moves, 0-1 37 ... Bd5-e6? blocks e6-sq and Black king get mated on e7-sq V Gunina vs A Muzychuk, 2012  (D43) Queen's Gambit Declined Semi-Slav, 38 moves, 1-0 29 ... Rc8-e8? blocks Black f8-king allowing 30 Qd2-d6+!+- Movsesian vs L Pantsulaia, 2012  (B43) Sicilian, Kan, 5.Nc3, 31 moves, 1-0 29 Bg2-h1?? stalemates White h2-king allowing 29 ... Ng6-e5!-+ Sasikiran vs Short, 2012  (A63) Benoni, Fianchetto, 9...Nbd7, 50 moves, 0-1 65 ... Nf6-h5+?? 66 Rb5xNh5+! 1-0 Black g6-rook is critic block Karjakin vs D Kokarev, 2012  (B97) Sicilian, Najdorf, 66 moves, 1-0 38 Bd2-f4?? leaves White h5-knight with no retreat(!) Fressinet vs Bacrot, 2012  (C50) Giuoco Piano, 38 moves, 0-1