Author: Thomas Lagershausen
Date: 04:18:17 04/26/01
Go up one level in this thread
On April 26, 2001 at 02:37:39, Uri Blass wrote: >game 1: > >In this position >R7/3r2k1/4b1p1/P2N3p/5P1P/3K1BP1/5b2/8 w - - 0 1 >>position happened > >Deep Fritz played 56.Kc4 0.47/15 Rc7 57.Kb4 0.28/16 Rd7 and the following > >[D]R7/3r2k1/4b1p1/P2N3p/1K3P1P/5BP1/5b2/8 w - - 0 1 > >Deep Fritz played 58.Nb6 0.09/16 time when it pondered 8:57 >and used 1007 knodes per second. > >I believe that it is a mistake in the time allocation of Deep Fritz. >It should use more time for 58.Nb6 and the time of pondering was not enough. > >The following facts are obvious: > >1)Deep Fritz had a possible move that force repetition(58.Kc4) White is a pawn up and should avoid a draw. >2)The score of Deep Fritz dropped and was only slightly above 0 > >I believe that programs should use more time in these situations. >The time control was 40/90 and it means that Deep Fritz probably had more than >45 minutes to calculate and in this situation that is not common I would prefer >to use at least half of them. > >After Rd3 it played 59.Bc6 and the score dropped to -0.06 and after the expected >move Rb3+ the score dropped again to -0.53 > > > > > > >game 3: > > >[D]8/q3kp2/3p1p2/r3pP2/1p2P1PP/8/P1PQNb1R/1K6 w - - 0 1 > >It seems that Nc1 is the only move for white not to lose material > >Deep Fritz played Qxb4 with 0.00 evaluation(it used 163 seconds and searahed 906 >knodes per second). >Only after Rxa2 the score dropped to -0.34 > >How much time do chess programs need to find Nc1? >Does it save white? No Nc1 is a weak move. No problem for Gandalf 4.32h to win the position on my K6-2+ 600Mhz Engine: Gandalf 4.32h von Steen Suurballe 7.01 0:01 +0.38 46...Le3 47.De1 Ta3 48.Te2 Lxc1 49.Kxc1 Txa2 50.Dxb4 Dg1+ 51.Kd2 Dxg4 (206.827) 129.2 8.01 0:03 +0.49 46...Le3 47.Dxb4 Ta4 48.Db3 Txe4 49.Th3 Lxc1 50.Kxc1 Txg4 (502.564) 143.5 9.01 0:07 +0.51 46...Le3 47.Dxb4 Ta4 48.Db3 Txe4 49.Te2 d5 50.a4 Ke8 51.Db5+ Ke7 (1.128.874) 146.6 10.01 0:21 +0.36 46...Le3 47.Dxb4 Ta4 48.Db3 Txe4 49.Te2 d5 50.a4 Ke8 51.a5 (3.280.657) 150.4 11.01 1:14 +0.38 46...Le3 47.Dxb4 Ta6 48.Sb3 Ta4 49.Dc3 Txe4 50.Te2 d5 51.Ka1 Db6 (10.833.887) 145.6 12.01 2:29 +0.49 46...Le3 47.Dxb4 Ta6 48.Sb3 Lf4 49.Th1 Ta4 50.Dc3 Txa2 51.Sc1 Ta4 52.Te1 Db7+ 53.Sb3 Txe4 54.Txe4 Dxe4 (21.774.330) 145.1 13.01 6:57 +0.83 46...Le3 47.Dxb4 Ta6 48.Sb3 Ta4 49.Db5 Txa2 50.g5 Ld4 51.gxf6+ Kd8 52.Kc1 Lc3 53.Td2 Lxd2+ 54.Sxd2 Dg1+ 55.Sf1 (59.135.806) 141.7 Thomas > >Uri
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