Wang,Yue (2739) - Ivanchuk,Vassily (2779)
[D30]
Corus Chess 2009 Wijk aan Zee (2 runda), 18.01.2009
1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Bg5 dxc4 5.Qa4+ Nbd7 6.Nc3 a6 7.g3 [Apparently a novelty, 7.e4 being the usual move.] 7...b5 8.Nxb5 Rb8 9.Na7?? Clearly based on a miscalculation, this move effectively loses a piece 9...Rb4 10.Bxf6 gxf6 11.Qa5 Bb7 12.Bh3 Qb8 13.Qh5 Ke7?! [The computer suggests 13...Rb6 as a more natural way to defend e6.] 14.d5 Qxa7 [14...Rxb2 is answered in the same fashion as in the game.; whilst 14...Bxd5 15.Qxd5 exd5 16.Nc6+ is the point of White's play. However, this variation may actually be the best for Black, as after 16...Kd6 17.Nxb8 Rxb8 he retains a clear advantage in the ending.] 15.dxe6 fxe6 16.Bxe6! Kxe6 17.Qe8+ Be7 18.Qxh8 Nf8 19.Qg8+ Kd7 20.0-0-0+? [Now Black seizes the advantage again. Instead, after 20.Qg4+ Black can probably not avoid a perpetual, eg. 20...Kc6 21.Qe4+ Kd7 22.Qf5+ etc.] 20...Ke8 21.Qg4 Qc5 22.a3 Rxb2! 23.Kxb2 Qxa3+ 24.Kb1 Qb3+ 25.Ka1 c3 0-1
1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Bg5 dxc4 5.Qa4+ Nbd7 6.Nc3 a6 7.g3 [Apparently a novelty, 7.e4 being the usual move.] 7...b5 8.Nxb5 Rb8 9.Na7?? Clearly based on a miscalculation, this move effectively loses a piece 9...Rb4 10.Bxf6 gxf6 11.Qa5 Bb7 12.Bh3 Qb8 13.Qh5 Ke7?! [The computer suggests 13...Rb6 as a more natural way to defend e6.] 14.d5 Qxa7 [14...Rxb2 is answered in the same fashion as in the game.; whilst 14...Bxd5 15.Qxd5 exd5 16.Nc6+ is the point of White's play. However, this variation may actually be the best for Black, as after 16...Kd6 17.Nxb8 Rxb8 he retains a clear advantage in the ending.] 15.dxe6 fxe6 16.Bxe6! Kxe6 17.Qe8+ Be7 18.Qxh8 Nf8 19.Qg8+ Kd7 20.0-0-0+? [Now Black seizes the advantage again. Instead, after 20.Qg4+ Black can probably not avoid a perpetual, eg. 20...Kc6 21.Qe4+ Kd7 22.Qf5+ etc.] 20...Ke8 21.Qg4 Qc5 22.a3 Rxb2! 23.Kxb2 Qxa3+ 24.Kb1 Qb3+ 25.Ka1 c3 0-1
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