Author: Klaus Friedel
Date: 22:36:57 02/06/03
Go up one level in this thread
On February 06, 2003 at 18:32:19, Will Singleton wrote: >On February 06, 2003 at 17:35:56, Dieter Buerssner wrote: > >>On February 06, 2003 at 16:57:29, Jon Dart wrote: >> >>>Here's a position that occurred in a recent offline test game: >>> >>>8/6r1/p7/1p6/3kBn1P/P2p1P2/1P6/3R1K2 b - - >>> >>>Ke3 is winning here, but Arasan 6.3 doesn't get this, in fact it wants to play >>>Rg8. It is apparently a null move issue. If I turn off null moves, or restrict >>>the null move in the case where the opponent has an advanced passer, then it is >>>solved quickly. >> >>I also get a rather big difference in search depth, but not so much in time. >>With null move after 8 s/d12, without 2 s/d8. (Yace, P4, 2.53 GHz). Each time a >>significant fail high for Ke3. >> >>Regards, >>Dieter > >With null, ply 12, 32 sec; without, ply 8, 3 sec. Interesting to look at >Ruffian, which goes to ply 15, 24 sec to find it (p4 2.8ghz). Maybe he really >does use null aggressively. > >Will New Hagrid seems to like this one: Less than 1 sek (ply 7) to find it with nullmove turned on (Athlon 1700). Neue Partie 8/6r1/p7/1p6/3kBn1P/P2p1P2/1P6/3R1K2 b - - 0 1 Analysis by Hagrid 0.8.40: 1...Tg7-g8 ± (0.83) Tiefe: 1/1 00:00:00 1...a6-a5 ± (0.79) Tiefe: 1/2 00:00:00 1...a6-a5 2.h4-h5 ± (1.03) Tiefe: 2/3 00:00:00 1...Kd4-e3 2.Td1-e1+ Ke3-d4 ± (0.91) Tiefe: 2/4 00:00:00 1...Kd4-e3 2.h4-h5 d3-d2 3.h5-h6 ± (0.91) Tiefe: 3/7 00:00:00 1...Tg7-c7 2.h4-h5 Tc7-c2 ± (0.84) Tiefe: 3/8 00:00:00 1...Tg7-c7 2.h4-h5 Tc7-c2 3.b2-b3 ± (0.95) Tiefe: 4/8 00:00:00 1...Tg7-g3 2.b2-b3 Tg3-h3 3.Le4-b7 Th3xh4 4.Lb7xa6 ² (0.64) Tiefe: 4/8 00:00:00 1...Tg7-g3 2.Le4-b7 Tg3-h3 3.Kf1-f2 Th3xh4 4.Lb7xa6 ² (0.59) Tiefe: 5/10 00:00:00 1...Tg7-g3 2.Le4-b7 Kd4-e3 3.b2-b3 d3-d2 4.b3-b4 Tg3-g6 ² (0.48) Tiefe: 6/11 00:00:00 48kN 1...Tg7-g3 2.b2-b3 Tg3-h3 3.Kf1-f2 b5-b4 4.a3xb4 Th3xh4 ² (0.58) Tiefe: 7/15 00:00:00 133kN 1...Kd4-e3 = (0.23) Tiefe: 7/15 00:00:00 260kN 1...Kd4-e3 = (-0.02) Tiefe: 8/15 00:00:01 364kN 1...Kd4-e3 ³ (-0.27) Tiefe: 9/15 00:00:02 559kN 1...Kd4-e3 ³ (-0.52) Tiefe: 9/15 00:00:02 731kN 1...Kd4-e3 2.h4-h5 ³ (-0.52) Tiefe: 9/17 00:00:02 786kN 1...Kd4-e3 µ (-0.77) Tiefe: 10/17 00:00:03 1431kN 1...Kd4-e3 2.Le4-f5 d3-d2 µ (-0.90) Tiefe: 10/19 00:00:03 1945kN 1...Kd4-e3 µ (-1.15) Tiefe: 11/19 00:00:05 2857kN 1...Kd4-e3 µ (-1.40) Tiefe: 12/20 00:00:08 4724kN 1...Kd4-e3 -+ (-1.65) Tiefe: 13/23 00:00:16 8451kN 1...Kd4-e3 -+ (-1.90) Tiefe: 13/23 00:00:29 10475kN 1...Kd4-e3 2.Le4xd3 Sf4-h3 3.Kf1-e1 Sh3-g1 4.Td1-c1 Sg1xf3+ 5.Ke1-d1 Ke3xd3 6.Tc1-c3+ Kd3-e4 7.h4-h5 Tg7-g1+ 8.Kd1-e2 Tg1-g2+ 9.Ke2-f1 Tg2xb2 10.Tc3-c7 -+ (-3.45) Tiefe: 13/23 00:00:42 28160kN 1...Kd4-e3 2.Le4xd3 Sf4-h3 3.Kf1-e1 Sh3-g1 4.Td1-c1 Sg1xf3+ 5.Ke1-d1 Ke3xd3 6.Tc1-c3+ Kd3-e4 7.b2-b4 Sf3xh4 8.Tc3-c6 Tg7-g6 9.Tc6-c7 Tg6-g2 -+ (-3.43) Tiefe: 14/25 00:00:56 37313kN 1...Kd4-e3 2.Le4xd3 Sf4xd3 3.b2-b3 Tg7-h7 -+ (-3.47) Tiefe: 15/27 00:02:34 101978kN Regards, Klaus
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