Even grandmasters make mistakes. Judith Polgar is an excellent player and usually plays positionally and tactically. However, in this game, she made a dubious knight sacrifice for open lines towards Karjakin's king. Karjakin proceeded to play positionally and punished her for this erroneous sacrifice.
Karjakin,Sergey (2732) - Polgar,Ju (2707) [B28]
2nd ACP World Rapid Cup Odessa UKR (1.2), 05.01.2008
1.e4 c5 2.Nf3 a6 3.c3 e6 4.d4 d5 5.e5 Nc6 6.Be2 Bd7 7.0-0 Rc8 8.a3 c4 9.Ng5 Na5 10.Be3 Nb3
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A Well Positioned Knight White to Move
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11.Ra2 Ne7 12.f4 Nf5 13.Bf2 Be7 14.Nf3 h5 15.Nbd2 Ba4 16.Qe1 Kd7 17.Nxb3 Bxb3 18.Ra1 Qb6 19.g3 Nh6 20.Qd2 h4 21.Ne1 hxg3 22.hxg3 Rcg8
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Kingside Pressure White to Move
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23.g4 g5 24.f5
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Black To Move What mistake does Polgar make here?
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Nxf5 25.gxf5 exf5 26.Bg3 Qe6 27.Rf2 f4 28.Bh2 Rh4 29.Rg2 Rgh8 30.Nf3 Rh3 31.Nxg5 f3 32.Nxe6 fxg2 33.Nc5+ Kc6 34.Qf4 Bc2 35.Qxf7 Bxc5 36.Qe6+ Kc7 37.dxc5 R3h6
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White to Move: A Resignable Position, but how should white convert his advantage?
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1-0
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