Fritz annotates

(1) Karjakin,Sergey (2694) - Alekseev,Evgeny (2716) [B90]
World Cup Khanty-Mansiysk RUS (5.4), 08.12.2007

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 e5 7.Nb3 Be7 8.f3 Be6 9.Qd2 Nbd7 10.g4 0-0 11.0-0-0 Qc7 12.Kb1 b5 13.g5 Nh5 14.f4 exf4 15.Bxf4 Nxf4 16.Qxf4 Rac8 17.Nd4 Nb6 18.Bd3 Qc5 19.Nf5 Rce8 20.Nxe7+ Rxe7 21.e5 d5 22.h4 Nc4 23.h5 d4? It is interesting to watch chess engines sink their teeth into this position. How long does it take them to come up with Karjakin's plan? [23...Qe3 was better.] 24.h6! g6 [24...Qxe5 doesn't save Black take a look at some of the lines: 25.Bxh7+ Kxh7 26.hxg7+ Kxg7 27.Qh4 Rc8 (27...Bf5 28.Qh6+ Kg8 29.Nd5 Bxc2+ 30.Ka1 (30.Kxc2?? Qe2+ 31.Rd2 Qxd2+ 32.Kb1 Qxb2# ) 30...f5 31.Nxe7+ Qxe7 32.Qh8+ Kf7 33.Rh7+ Kg6 34.Rh6+ Kf7 35.Qh7+ Ke8 36.Qg6+ Rf7 37.Qxa6+- ) 28.Qh6+ Kg8 29.Qf6 Qxf6 30.gxf6 Ne5 (30...Rd7 31.Rdg1+ with mate to follow.) 31.fxe7 Ng6 32.Rxd4+- ] 25.Nd5 Qxd5? loses quickly. [Black can try 25...Na3+ but after 26.bxa3 (or simply 26.Kc1+- ) 26...Qxd5 27.Qf6 Qxe5 (27...Qxa2+?? 28.Kc1 does not stop the white mate on g7.) 28.Qxe5 Bxa2+ 29.Kxa2 Rxe5 White is winning.] 26.Bxc4 Qxc4 27.Qf6 and now Black cannot stop the mate. 1-0

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