Author: Ernst A. Heinz
Date: 07:18:19 08/01/98
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On August 01, 1998 at 09:57:28, Christophe Theron wrote: >On July 31, 1998 at 22:51:18, blass uri wrote: > >>position: >>2r2rk1/2q2pP1/p1b1pp2/1p6/4P3/2Np3P/PPP3Q1/1K4R1 >>white to move. >> >>Fritz5 arrived to a winning position because it has a better positional >>understanding. >> >>Fritz5 played 25.cxd3 and made a draw when 25.Qd2 is winning for white >> >>Fritz5 using 131072Kbytes hash tables needed almost 30 minutes to find >>Qd2 >>Junior5(16 bit version for fritz) needed 10 minutes and 40 seconds >>using 31000 Kbytes >> >>This is on pentium200MMX >> >>Genius3 needed 42 seconds to find Qd2 on a pentium100Mh with 15 Mbytes hash >>tables. > >This is an interesting point, Uri. As far as I know, nobody had seen this line. > >Just for fun I tried the position on various versions of Chess Tiger. Here are >the results on my K5-100 16Mb hash, and an estimation for P2-300 16Mb hash (in >fact I had P2-300 with 32Mb hash in Paris): > >CT 11.0 (Paris version) : Qd2 found in 641.91s, 213.97s on P2-300. >CT 11.2 (Paderborn ver.): Qd2 found in 398.15s, 132.72s on P2-300. >CT 11.4 : Qd2 found in 426.71s, 142.24s on P2-300. >CT 11.5 (current) : Qd2 found in 365.47s, 121.82s on P2-300. > >Times on P200MMX should be 25% less than on K5-100. > >With white, Chess Tiger would have missed the win in Paris (and would have >played cxd3). In Paderborn, it would have played the right move. :) This really is an interesting position. "DarkThought" locks onto Qd2 in iteration #11 after 45 sec. on a 600MHz Alpha-21164a with a score of +1. =Ernst=
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