Author: John Merlino
Date: 13:01:12 07/15/04
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On July 15, 2004 at 13:47:41, Alan Grotier wrote: >From the book -Chess: the Art of logical thinking page 50.By GM Neil McDonald >A. Shirov against J. Polgar 1994 theme chess. Shirov knew Polgar would play >c5 to e4. > >Following is the position reached after move 15.....Polgar Black played Qxg5! >Shirov White played 16. Ca5..Is this the best continuation? Shirov resigned on >the 29th move. > >[D]r3kb1r/1b3p2/p2pp3/4nnqP/1p2P3/1N6/PPP1NBQP/R3KB1R w KQkq - 0 16 > >F8.0023 analysed for 8hrs with the following result. >16.h4 Qg4 17.Nd2 Qxh5 18.Nf4 Qh7 19,Qh2 Bh6. Does this defence look correct? > >AMD Athlon xp 2800+ 2.02Ghz. Score = -1.12 Considering move Bg3(14/38) > Depth=18/51 hash=128. kN/s=1118 Here's the whole game: [Event "Theme (SIC) tournament"] [Site "Buenos Aires ARG"] [Date "1994.10.??"] [Round "8"] [White "Shirov, Alexei D"] [Black "Polgar, Judit"] [TimeControl "-"] [Result "0-1"] [ECO "B54"] [WhiteELO "2740"] [BlackELO "2630"] [WhiteTitle "IGM"] [BlackTitle "IGM"] [WhiteCountry "LAT"] [BlackCountry "HUN"] 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 d6 6.g4 a6 7.Be3 Nge7 8.Nb3 b5 9.f4 Bb7 10.Qf3 g5 11.fxg5 Ne5 12.Qg2 b4 13.Ne2 h5 14.gxh5 Nf5 15.Bf2 Qxg5 16.Na5 Ne3 17.Qg3 Qxg3 18.Nxg3 Nxc2+ 19.Kd1 Nxa1 20.Nxb7 b3 21.axb3 Nxb3 22.Kc2 Nc5 23.Nxc5 dxc5 24.Be1 Nf3 25.Bc3 Nd4+ 26.Kd3 Bd6 27.Bg2 Be5 28.Kc4 Ke7 29.Ra1 Nc6 0-1 16.Na5 is definitely not optimal. Nor, IMHO, was 11.fxg5, allowing 11...Ne5 and the beginning of a brutal attack. CM9_SKR, on an AMD 2500+, says this about the position after 15...Qxg5: Time Depth Score Positions Moves 0:00 1/3 -1.06 1244 16.Qxg5 Nf3+ 17.Kd1 Nxg5 18.Nd2 Nxe4 19.Nxe4 Bxe4 0:00 1/3 -0.88 1622 16.h4 Qxh5 17.Nd2 0:00 1/3 0.70 3456 16.Na5 Ne3 17.Bxe3 Qxe3 18.Nxb7 Rxh5 0:00 1/4 0.70 6138 16.Na5 Ne3 17.Bxe3 Qxe3 18.Nxb7 Rxh5 0:00 1/5 -1.98 24680 16.Na5 Ne3 17.Qg3 Qxg3 18.Nxg3 Nf3+ 19.Ke2 0:00 1/5 -1.11 32495 16.h4 Qh6 17.Rc1 Ne3 18.Qg3 Nxf1 19.Kxf1 Bxe4 0:00 1/5 -1.04 63155 16.Nd2 Bh6 17.O-O-O Rc8 18.Kb1 Qxh5 0:00 1/6 -1.08 110174 16.Nd2 Qxh5 17.O-O-O Rc8 18.Nf4 Qh6 0:00 1/6 -0.85 135926 16.h4 Qh6 17.Nd2 Ne3 18.Bxe3 Qxe3 19.O-O-O Rxh5 0:01 1/7 -1.00 246604 16.h4 Qh6 17.Rh3 Rc8 18.Kd1 Be7 19.Nd2 Qxh5 0:03 1/8 -0.94 680941 16.h4 Qg4 17.Qxg4 Nxg4 18.Rg1 Nfe3 19.Bxe3 Nxe3 20.Kf2 Bh6 0:09 1/9 -0.91 2050967 16.h4 Qh6 17.Nd2 Rc8 18.O-O-O Ne3 19.Bxe3 Qxe3 20.Qg5 Qc5 0:21 2/10 -1.05 4666967 16.h4 Qxh5 17.Nf4 Qh6 18.Nd5 exd5 19.exf5 Rc8 20.Kd1 Be7 0:53 2/11 -1.20 12228221 16.h4 Qxh5 17.Nf4 Qh6 18.Nd5 Rc8 19.Kd1 Bg7 20.Nd2 Nd7 21.Nc4 Bxd5 22.exd5 3:04 2/12 -1.19 41906623 16.h4 Qh6 17.Rh3 Rc8 18.c3 Be7 19.Na5 Ba8 20.Rd1 Rb8 21.c4 Qxh5 jm
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