Author: Uri Blass
Date: 12:03:08 08/24/04
Go up one level in this thread
On August 24, 2004 at 14:49:02, Stuart Cracraft wrote: >[D]6k1/1q3ppp/r7/1rp1P1n1/3p1P2/1P1R2PP/2Q4K/B4R2 b - f3 0 1 > >I spent a half hour adding enpassant. Things have changed quite a bit. > >Old version (no enpassant): > >NULLMV TT(524288) Alpha=-282 Beta=218 Maxdepth=9999999 MaxTime=9999 > 1/16 g5f3 0.01 31 409 g5f3 f1f3 > 2/16 g5f3 0.01 31 1539 g5f3 f1f3 b7f3 > 3/18 h2h1 0.04 46 6555 a6a1 f1a1 g5f3 d3f3 > 4/22 f1f3 0.10 46 19783 a6a1 f1a1 g5f3 d3f3 b7f3 > 5/22 a6a1 0.30 44 68423 a6a1 f1a1 g5f3 d3f3 b7f3 a1a3 > 6/22 a6a1 0.61 44 165863 a6a1 f1a1 g5f3 d3f3 b7f3 a1a3 b5b3 > 7/27 a6a1 2.33 44 613855 a6a1 f1a1 g5f3 d3f3 b7f3 a1a3 b5b3 > 8/35 g5h3 19.96 66 4712723 g5h3 e5e6 a6e6 g3g4 h3f4 f1f4 e6h6 h2g3 b7h1 > 9/37 g5h3 43.14 66 9160224 g5h3 e5e6 a6e6 g3g4 h3f4 f1f4 e6h6 h2g3 b7h1 a1d >4 >10/39> g5h3 78.28 316 14437157 g5h3 e5e6 a6e6 g3g4 h3f4 f1f4 e6e1 a1b2 b7h1 h2g >3 e1e8 >10/49 g5h3 400.73 1993 77426285 g5h3 d3f3 a6h6 h2g2 g7g5 c2f5 g5f4 b3b4 b5b4 > >New version (enpassant): > >Alpha=-282 Beta=218 Maxdepth=9999999 MaxTime=9999 > 1/ 6 g5e4 0.00 -18 128 g5e4 > 2/12 g5f3 0.01 31 879 g5f3 f1f3 > 3/12 g5f3 0.02 31 3110 g5f3 f1f3 a6a1 > 4/16 g5f3 0.05 27 10544 g5f3 f1f3 a6a1 h2g2 > 5/16 g5f3 0.14 31 37731 g5f3 f1f3 a6a1 c2c4 a1e1 > 6/16 a6a1 0.43 44 133066 a6a1 f1a1 g5f3 d3f3 b7f3 a1a3 > 7/19 a6a1 1.16 44 373837 a6a1 f1a1 g5f3 d3f3 b7f3 a1a3 f3f1 > 8/21 a6a1 3.60 38 1170000 a6a1 f1a1 g5f3 d3f3 b7f3 a1a3 f3f1 c2f5 > 9/21 a6a1 10.00 37 3205065 a6a1 f1a1 g5f3 d3f3 b7f3 a1a3 g8h8 c2c4 f3f2 >10/22 a6a1 23.50 33 7729006 a6a1 f1a1 g5f3 d3f3 b7f3 a1a3 b5b8 c2g2 f3e3 g2d >5 >11/26 a6a1 117.61 17 33944891 a6a1 f1a1 g5f3 d3f3 b7f3 c2d3 f3f2 h2h1 b5b8 a1 >a5 >12/27 a6a1 374.76 11 91936739 a6a1 f1a1 g5f3 d3f3 b7f3 c2d3 f3f2 h2h1 b5b8 a1 >c1 f2b2 > > >After forcing 1. ... Nxh3 2. Kxh3, the new version plays: > >Alpha=-2291 Beta=-1791 Maxdepth=9999999 MaxTime=9999 > 1/ 6 a6h6 0.00 -2034 101 a6h6 > 2/11 a6h6 0.01 -2031 1535 a6h6 h3g4 > 3/11 a6h6 0.02 -2025 3411 a6h6 h3g4 b7e4 > 4/15 a6h6 0.08 -2036 20337 a6h6 h3g4 b7e4 a1b2 > 5/16 a6h6 0.19 -2029 51326 a6h6 h3g4 b7d7 g4f3 d7h3 > 6/17 a6h6 1.06 -2037 320686 a6h6 h3g4 h6g6 g4f5 b7d7 > 7/19 a6a3 4.15 -2036 1131687 a6a3 f1c1 b5b3 d3b3 a3b3 c2c5 b7d7 > 8/21 a6h6 20.93 -2029 5385298 a6h6 h3g4 b7c6 a1b2 f7f5 e5f6 > 9/21 a6h6 30.15 -2028 7432631 a6h6 h3g4 b7c6 c2c4 b5b4 c4c2 c6e6 g4f3 e6h3 >10/23> a6h6 31.20 -1778 7728161 a6h6 h3g4 b7c6 c2c4 b5b4 c4c2 b4b5 c2c4 b5b4 c4 >c2 b4b5 >10/23 a6h6 47.26 -1049 12729030 a6h6 h3g4 f7f5 e5f6 >11/24 a6h6 110.03 -1033 30117999 a6h6 h3g4 b5b6 c2e2 b6b3 f1e1 b3d3 e2d3 b7g2 > >And then lastly sees a draw by forced repetition: > >Alpha=-2327 Beta=-1827 Maxdepth=9999999 MaxTime=9999 > 1/ 6 b7e4 0.00 -2071 110 b7e4 > 2/11 h6g6 0.01 -2080 961 h6g6 g4f5 > 3/11 h6g6 0.02 -2076 2849 h6g6 g4f5 b7e7 > 4/17 b7e4 0.11 -2082 23213 b7e4 a1b2 h6g6 > 5/17 h6g6 0.25 -2081 67767 h6g6 g4f5 b7d7 f5e4 d7g4 > 6/17 b7c6 1.20 -2076 303550 b7c6 c2c4 b5b4 c4c2 h6g6 g4f5 > 7/17 b7c6 2.52 -2073 613462 b7c6 c2c4 b5b4 c4c2 h6g6 g4f5 c6e6 > 8/20> b7c6 3.58 -1823 923237 b7c6 c2c4 b5b4 c4c2 b4b5 c2c4 b5b4 c4c2 b4b5 > 8/20 f7f5 6.31 0 1777878 f7f5 e5f6 h6g6 g4h3 g6h6 h3g4 h6g6 g4h3 g6h6 h3g >4 > 9/21 f7f5 13.85 0 3964065 f7f5 e5f6 h6g6 g4h3 g6h6 h3g4 h6g6 g4h3 g6h6 h3g >4 >10/22 f7f5 23.98 0 7473556 f7f5 e5f6 h6g6 g4h3 g6h6 h3g4 h6g6 g4h3 g6h6 h3g >4 > >However, Bob's comments about "unclear" points out that there is >still an issue with the analysis above as there is no clear draw?!? >What is the draw-refutation to f5 exf6 Rg6+ ? > >Stuart f5 is not the right move so there is no need to try to refute draw Nxh3 Kxh3 Rh6+ Kg4 Rb6! is the right line for black to win the game. Uri
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