Author: Joachim Rang
Date: 12:53:09 09/13/02
Go up one level in this thread
On September 13, 2002 at 15:04:33, John Merlino wrote: >On September 13, 2002 at 11:11:00, Jim Monaghan wrote: > >>Hi, >> >>[D] 2r1r1k1/pp1nbpp1/4pn1p/q3NN1P/P1pP1B2/2P5/1PQ2PP1/R3R1K1 w - - >> >>Most everyone enjoys a good king hunt, but perhaps this one is not so clear. >>There are a lot of different ways White can sac his pieces in Black's king's >>field here. The game went: >> >>[Event "Wijk aan Zee"] >>[Site "?"] >>[Date "1979"] >>[Round "-"] >>[White "Gaprindashvili"] >>[Black "Nikolac"] >>[Result "1-0"] >>[FEN "2r1r1k1/pp1nbpp1/4pn1p/q3NN1P/P1pP1B2/2P5/1PQ2PP1/R3R1K1 w - - 0 1"] >>[SetUp "1"] >> >>1. Nxg7 Kxg7 2. Bxh6+ Kxh6 3. Nxf7+ Kxh5 4. g4+ Kh4 5. f3 Nxg4 6. Re4 >>1-0 >> >>I think you may get a lot of different answers with this position depending on >>the analysis engine chosen. >> >>Cheers, >>Jim > >Analysis done with Chessmaster 9000 on a PIII-600. It does not see a sacrifice >at all, but instead plays Nxd7. The problem with the line that was played in the >game is that 2...Kxh6 is a huge blunder. 2...Kg8, on the other hand, appears to >lead to a draw: > >Time Depth Score Positions Moves >0:00 1/3 -2.41 1199 2...Kxh6 3.Nxf7+ Kxh5 4.Qe2+ Kg6 > 5.Qxe6 >0:00 1/4 -1.75 5313 2...Kxh6 3.Nxf7+ Kxh5 4.Rxe6 Bf8 > 5.Ne5 Nxe5 6.Rxf6 >0:00 1/5 -1.85 17321 2...Kxh6 3.Nxf7+ Kxh5 4.Rxe6 Bf8 > 5.Ne5 Kh4 >0:02 1/6 0.00 73190 2...Kxh6 3.Nxf7+ Kxh5 4.g4+ Kxg4 > 5.Qg6+ Kh4 6.Re4+ Nxe4 7.Qxe4+ > Kh5 8.Qh7+ Kg4 9.Qe4+ Kh5 >0:04 1/7 3.57 274068 2...Kxh6 3.Nxf7+ Kg7 4.Qg6+ Kf8 > 5.Ng5 Qxg5 6.Qxg5 Bd6 7.h6 Ke7 8.h7 >0:04 1/7 0.19 311140 2...Kg8 3.Re3 Nxe5 4.Rxe5 Nd5 5.Rxe6 > Nf6 6.Re5 >0:06 1/8 0.00 448506 2...Kg8 3.Qc1 Kh7 4.Qc2+ Kg8 >0:11 1/9 0.00 860292 2...Kg8 3.Qc1 Kh7 4.Qc2+ Kg8 >0:28 1/10 0.00 2126834 2...Kg8 3.Qc1 Kh7 4.Qc2+ Kg8 >1:24 2/11 0.00 6637293 2...Kg8 3.Qc1 Kh7 4.Qc2+ Kg8 >4:06 3/12 0.00 20927050 2...Kg8 3.Qc1 Kh7 4.Qc2+ Kg8 > >...whereas 2...Kxh6: > >Time Depth Score Positions Moves >0:00 1/3 -1.75 3150 3.Nxf7+ Kxh5 4.Rxe6 Bf8 5.Ne5 Nxe5 > 6.Rxf6 >0:00 1/4 -1.85 10110 3.Nxf7+ Kxh5 4.Rxe6 Bf8 5.Ne5 Kh4 >0:01 1/5 0.00 60561 3.Nxf7+ Kxh5 4.g4+ Kxg4 5.Qg6+ > Kh4 6.Re4+ Nxe4 7.Qxe4+ Kh5 8.Qh7+ > Kg4 9.Qe4+ Kh5 >0:05 1/6 3.45 326242 3.Nxf7+ Kg7 4.Qg6+ Kf8 5.Ng5 Qxg5 > 6.Qxg5 Bd6 7.h6 Ke7 8.h7 >0:07 1/7 3.40 552350 3.Nxf7+ Kg7 4.Qg6+ Kf8 5.Ng5 Qxg5 > 6.Qxg5 Bd6 7.h6 Re7 8.a5 e5 >0:19 1/8 4.22 1563593 3.Nxf7+ Kg7 4.Qg6+ Kf8 5.h6 Ba3 > 6.Ng5 Ke7 7.Rxe6+ Kd8 8.Rxe8+ Nxe8 > 9.h7 Nf8 10.Qh5 Rc5 11.dxc5 >0:50 1/9 4.80 4223661 3.Nxf7+ Kg7 4.Qg6+ Kf8 5.h6 Ba3 > 6.Ng5 Ke7 7.Rxe6+ Kd8 8.Nf7+ Kc7 > 9.Qg3+ Ne5 10.Rxe5 Rxe5 11.Rxa3 > Re8 12.dxe5 >3:10 1/10 6.42 16890907 3.Nxf7+ Kg7 4.Qg6+ Kf8 5.h6 Bb4 > 6.Ng5 Ke7 7.Rxe6+ Kd8 8.Rxe8+ Nxe8 > 9.h7 Rc6 10.Nf7+ Kc8 11.Nd6+ Nxd6 > 12.h8=Q+ Kc7 13.cxb4 Qxb4 > >jm the position after 2...Kg8 is lost too. White has to play 3.Re3 instead of Qc1 or Qd2. After 3...Nxe5 (all other moves looses quicker) CT14 (Duron 700 MHz 32 MB Hash) give us the following analysis: 2r1r1k1/pp2bp2/4pn1B/q3n2P/P1pP4/2P1R3/1PQ2PP1/R5K1 w - - 0 1 Analysis by Chess Tiger 14.0: 4.Txe5 Sd5 5.Txe6 Lf8 6.Txe8 Txe8 7.Lxf8 Kxf8 8.h6 = (-0.08) Tiefe: 10 00:00:00 82kN 4.Txe5 Sd5 5.Txe6 Lf8 6.Txe8 Txe8 7.Lxf8 Kxf8 8.h6 Db6 9.h7 Df6 ³ (-0.26) Tiefe: 10 00:00:00 88kN 4.Txe5 Sd5 5.Txe6 Lf8 6.Txe8 Txe8 7.Lxf8 Kxf8 8.Df5 Te6 9.Tf1 ³ (-0.30) Tiefe: 11 00:00:01 229kN 4.Txe5 Sd5 5.Txe6 Lf8 6.Tg6+ fxg6 7.Dxg6+ Kh8 8.Lxf8 Txf8 9.Dh6+ Kg8 10.Dg6+ Kh8 ³ (-0.29) Tiefe: 12 00:00:02 514kN 4.dxe5 ² (0.60) Tiefe: 12 00:00:07 1420kN 4.dxe5 ² (0.60) Tiefe: 13 00:00:10 1858kN 4.dxe5 +- (1.50) Tiefe: 13 00:00:23 4342kN 4.dxe5 Sxh5 5.De4 Lf8 6.Lxf8 Kxf8 7.Dh4 Db6 8.Te2 Sg3 9.Dh6+ Ke7 10.Dg5+ Kf8 11.Dxg3 +- (1.58) Tiefe: 13 00:00:28 5201kN 4.dxe5 Sxh5 5.De4 Lf8 6.Lxf8 Kxf8 7.Dh4 Sg7 8.Dh8+ Ke7 9.Dxg7 Tg8 10.Df6+ Ke8 11.Tf3 Dc7 12.Td1 +- (1.76) Tiefe: 14 00:01:21 15411kN 4.dxe5 Lf8 5.Tg3+ Kh8 6.Lxf8 Txf8 7.exf6 Tg8 8.Txg8+ Txg8 9.De4 Dxh5 10.Dxb7 Dg5 11.Td1 Dxf6 12.Dxa7 +- (1.86) Tiefe: 15 00:08:33 93628kN 4.dxe5 Lf8 5.Tg3+ Kh8 6.Lxf8 Txf8 7.exf6 Tg8 8.Txg8+ Txg8 9.De4 Dc7 10.De3 Kh7 11.h6 Dc6 12.Dh3 +- (2.06) Tiefe: 16 00:11:36 123876kN
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