The position is from Boris Gelfand-Wang Hao during the fourth round at the London Chess Grand Prix (Report on Chess Blog.) Black has just played 55. …Kh7. Do you know why that is a blunder? This win gives Boris Gelfand sole lead at the London Chess Grand Prix after four rounds.

The move 55….Kh7 is a blunder on Black’s part. White goes 56.Kf7 and there is no way to stop the checkmate for Black down the h-file with White playing Rh1.

Here is the full game with Chess King.

Gelfand Boris – Wang Hao

Result: 1-0
Site: FIDE Grand Prix
Date: 2012.09.24
[…] 1.d4 ¤f6 2.c4 e6 3.¤f3 d5 4.g3 ¥b4+ 5.¥d2 ¥e7 6.¥g2 c6 7.O-O O-O 8.£c2 b6 9.¥f4 ¥a6 10.cxd5 cxd5 11.¦c1 ¤bd7 12.¤c3 b5 13.a4 £b6 14.axb5 ¥xb5 15.¤xb5 £xb5 16.¥f1 a5 17.e3 £b7 18.£c6 £xc6 19.¦xc6 a4 20.¥b5 a3 21.bxa3 ¥xa3 22.¦c7 ¤b6 23.¦b7 ¤c4 24.¥xc4 dxc4 25.¦c7 h6 26.¦xc4 g5 27.¥e5 ¤e4 28.g4 ¥e7 29.¦xa8 ¦xa8 30.¦c2 f6 31.¥g3 ¢f7 32.¢g2 h5 33.gxh5 ¦h8 34.¦c7 g4 35.¤e1 ¦xh5 36.¤d3 ¦b5 37.h3 gxh3+ 38.¢xh3 ¢e8 39.¦a7 ¦b3 40.¤f4 ¤xg3 41.¢xg3 ¥d6 42.¢f3 ¥xf4 43.¢xf4 ¦b2 44.f3 ¦h2 45.¢e4 ¦h3 46.¦b7 ¢f8 47.¦d7 ¢e8 48.¦c7 ¢f8 49.f4 f5+ 50.¢e5 ¦xe3+ 51.¢f6 ¢g8 52.¦g7+ ¢f8 53.¦h7 ¢g8 54.¦h1 ¦e4 55.¦d1 ¢h7 56.¢f7