Author: Bernhard Bauer
Date: 04:55:38 11/15/05
Go up one level in this thread
On November 14, 2005 at 11:25:28, Vincent Lejeune wrote: >[d]6k1/1p1r1pp1/3p3p/NP1Pp1n1/P3P2n/8/5K1P/4RB2 w - - 0 34 > >Nxb7! > >[Event "?"] >[Site "?"] >[Date "2005.11.06"] >[Round "3.8"] >[White "x"] >[Black "y"] >[Result "*"] >[SetUp "1"] >[FEN "6k1/1p1r1pp1/3p3p/NP1Pp1n1/P3P2n/8/5K1P/4RB2 w - - 0 34"] >[PlyCount "13"] > >34. Nxb7 Rxb7 35. a5 Rc7 36. b6 Rc2+ 37. Re2 Nxe4+ 38. Kg1 Nf3+ 39. Kh1 Rc1 40. >Rxe4 * Thank you for posting this position. For a human it is easy to see that the white a and b pawns are strong. So I changed the PastPawn parameter in Gambitfruit from 100 to 150. Nxb7 is found in 8 sec, however the engine switches to Nc6, which may be a good move too. Changing the the PastPawn parameter to a greater value will result in finding Nxb7 very early and give a good score too. FEN: 6k1/1p1r1pp1/3p3p/NP1Pp1n1/P3P2n/8/5K1P/4RB2 w - - 0 1 GambitFruit1.0-Beta2: 12/32 00:08 5.466.734 708.482 -1,11 Na5xb7 Rd7xb7 a4a5 Rb7c7 a5a6 Rc7c2+ Kf2g3 Nh4f3 Re1e3 f7f5 e4xf5 Nf3d4 Bf1d3 Rc2a2 13/32 00:11 7.800.592 686.337 -0,62 Na5xb7 Rd7xb7 a4a5 f7f5 e4xf5 Rb7f7 a5a6 Nh4xf5 b5b6 Nf5d4+ Kf2g2 Ng5f3 Re1c1 Nf3h4+ Kg2g1 g7g5 Rc1c8+ Kg8g7 14/34 00:19 13.157.293 691.559 -0,71 Na5xb7 Rd7xb7 a4a5 Rb7c7 a5a6 Rc7c2+ Kf2g3 Nh4f3 Re1e3 Nf3d2 Bf1d3 Ng5xe4+ Re3xe4 Nd2xe4+ Bd3xe4 Rc2a2 Be4b1 Ra2a3+ Kg3f2 Kg8f8 Bb1c2 15/42 00:36 24.920.938 699.986 -0,89 Na5xb7 Rd7xb7 a4a5 Rb7c7 a5a6 Rc7c2+ Kf2g3 Nh4f3 Re1e3 Nf3d2 Bf1d3 Ng5xe4+ Re3xe4 Nd2xe4+ Bd3xe4 Rc2a2 Kg3f3 g7g6 Be4b1 Ra2a3+ Kf3e2 f7f5 15/42 02:00 82.720.696 686.846 -0,70 Na5c6 Nh4f3 Re1e3 Nf3xh2 Bf1e2 f7f5 e4xf5 e5e4 Nc6d4 Rd7f7 Kf2g3 Nh2f3 Nd4xf3 e4xf3 Be2xf3 Rf7xf5 Re3e8+ Kg8f7 16/42 03:06 127.588.705 684.587 -0,43 Na5c6 Nh4f3 Re1e3 Nf3xh2 Bf1e2 f7f5 e4xf5 e5e4 a4a5 Rd7f7 a5a6 b7xc6 d5xc6 d6d5 b5b6 Rf7xf5+ Kf2e1 d5d4 17/43 05:41 232.425.092 680.331 -0,11 Na5c6 f7f5 e4xf5 Rd7f7 a4a5 Nh4xf5 Nc6d8 Rf7d7 Nd8e6 Rd7e7 Ne6xg5 h6xg5 a5a6 b7xa6 b5xa6 e5e4 Kf2g2 e4e3 Bf1d3 18/54 11:01 448.637.189 678.638 0,00 Na5c6 f7f5 e4xf5 Rd7f7 a4a5 Rf7xf5+ Kf2e2 Rf5f4 a5a6 b7xa6 b5xa6 Rf4e4+ Ke2f2 Re4f4+ Kf2e2 Here is a similar position from Ortueta-Sanz, Madrid 1934. 1. ... Rxb2 is found in 164 sec, which is pretty good on an AMD 1800 MHz. [D]8/pR4pk/1b6/2p5/N1p5/8/PP1r2PP/6K1/ b FEN: 8/pR4pk/1b6/2p5/N1p5/8/PP1r2PP/6K1 b - - 0 1 GambitFruit1.0-Beta2: 16/39 02:44 121.773.656 738.827 +2,93 Rd2xb2 Na4c3 Rb2c2 Nc3e4 c4c3 Kg1f1 c5c4 Rb7e7 Rc2c1+ Kf1e2 c3c2 Ke2d2 Bb6e3+ Kd2c3 Be3d4+ Kc3d2 Rc1g1 Kd2xc2 Rg1xg2+ Kc2d1 Rg2xh2 Re7c7 17/39 03:19 145.704.040 731.371 +2,99 Rd2xb2 Na4c3 Rb2c2 Nc3e4 c4c3 Kg1f1 Rc2xg2 Ne4xc3 Rg2xh2 Rb7d7 c5c4 a2a4 Kh7g6 Nc3e4 a7a5 Kf1e1 Bb6e3 18/39 04:03 176.761.444 727.848 +2,96 Rd2xb2 Na4c3 Rb2c2 Nc3e4 c4c3 Kg1f1 Rc2xg2 Ne4xc3 Rg2xh2 Rb7b8 c5c4 Rb8c8 Rh2h4 Nc3d5 g7g5 Kf1g2 Kh7g7 Rc8e8 Kind regards Bernhard
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