Author: Uri Blass
Date: 11:56:42 08/08/03
Go up one level in this thread
On August 08, 2003 at 14:37:25, Dana Turnmire wrote: >The following position is from Karpov - Yusupov 1988. This is what FM Graham >Burgess says about what he considers the brilliant move 16 d5!! > >"This pawn sacrifice both gives the white knight an ideal post in the centre and >opens several lines for the other white pieces." > >Phoenix Genius finds the pawn sacrifice in 1'29" with a plus score of 1.03 while >Chessmaster default and SKR can't even find it after 5 minutes. > >[D] 4r2r/pp1nkp1p/2p1b1p1/5q2/2BP4/4QN2/PP3PPP/4RK1R w - - 0 1 Fritz8 finds it immediately but lose it later I am not sure if the sacrifice is the best move or the only best move. A possible test is a match between chessmaster and Genius from the relevant position. Here is Fritz8's analysis New game 4r2r/pp1nkp1p/2p1b1p1/5q2/2BP4/4QN2/PP3PPP/4RK1R w - - 0 1 Analysis by Fritz 8: 1.d5 cxd5 2.Nd4 Qh5 3.Nxe6 fxe6 4.Qxe6+ Kd8 ± (1.34) Depth: 6/20 00:00:00 138kN 1.d5 cxd5 2.Nd4 Qe5 3.Qd2 Qh5 4.Bb5 ± (1.31) Depth: 7/21 00:00:00 170kN 1.d5 cxd5 2.Nd4 Qh5 3.Nxe6 fxe6 4.Qxe6+ Kd8 ± (1.06) Depth: 8/24 00:00:01 451kN 1.d5 cxd5 2.Bb5 Kd8 3.Bxd7 Bxd7 4.Qxa7 Rxe1+ 5.Nxe1 Kc7 6.Kg1 ± (0.91) Depth: 9/29 00:00:04 1876kN 1.Ng5! ± (0.94) Depth: 9/29 00:00:09 3747kN 1.Ng5 Kf8 2.Nxe6+ fxe6 3.Bxe6 Qb5+ 4.Kg1 Kg7 5.Qd2 Nf6 6.Re5 Qb6 7.b4 ± (0.84) Depth: 10/31 00:00:16 6730kN 1.d5! ± (0.88) Depth: 10/31 00:00:17 6986kN 1.Bxe6! ± (0.91) Depth: 10/33 00:00:26 10933kN 1.Bxe6 fxe6 2.Qb3 Rb8 3.h4 Qd5 4.Qe3 Rbe8 5.h5 ± (0.94) Depth: 10/33 00:00:26 11138kN 1.Bxe6 fxe6 2.Qb3 b6 3.Kg1 Kf7 4.Qa4 Qd5 5.Ne5+ Nxe5 6.dxe5 Qd2 7.Qxa7+ Re7 ± (0.91) Depth: 11/32 00:00:38 16402kN 1.Bxe6 fxe6 2.Qb3 Nb6 3.Qa3+ Kf6 4.Qxa7 Qb5+ 5.Kg1 Re7 6.Qa3 Ra8 7.Qe3 Kg7 8.Ne5 ± (0.78) Depth: 12/38 00:02:09 57504kN 1.Ng5! ± (0.81) Depth: 12/38 00:02:29 66532kN 1.Ng5! ± (0.97) Depth: 12/38 00:02:39 71070kN 1.Ng5 Kf8 2.Nxe6+ fxe6 3.Bxe6 Qb5+ 4.Kg1 Kg7 5.h4 h5 6.Qc3 Nf6 ± (1.03) Depth: 12/38 00:02:55 77883kN (, eim 08.08.2003) Uri
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