Author: J. Wesley Cleveland
Date: 18:36:57 02/02/99
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On February 02, 1999 at 08:08:38, Robert Hyatt wrote: >On February 02, 1999 at 07:38:16, Bas Hamstra wrote: > >>Of course I know it's not secret :) >> >>Bob I saw you referrring to the new experimental code somewhere. I am very >>curious what your cheapo version of SE looks like. Does it work? How much does >>it cost? Do you score better in suites? Do you win more games? >> >>If it's to early to say - first impressions? >> >> >>Bas Hamstra. > > >No real impression yet. This is code I experimented with about 3-4 years ago, >early in the crafty development. I saved it because I didn't like the overhead >back then, when I was a whole lot slower. I fixed the code to match the new >SMP code in crafty, and sent it to Mike Byrne (running fitter on ICC). He has >continued to tweak around with it, and has reported some good things on some >types of positions (ie the mate in 6 in WAC 141 has always been a hard position >for crafty. It now finds the right move in about 15 seconds on my quad xeon, >but mike has reported something 5-10 times faster on his dual PII/400. I'll >certainly post results as we test this... the 'first impression' is that you >will lose about a ply of basic search depth, but for that you get a lot more >tactical acuity. It doesn't work so well in endgames, last time I tried, >because it is _easy_ to over-extend since there are so many singular lines that >advance passed pawns... > >part of what Mike is doing is finding out where/when/how-much to limit them.. I'd like to see this. Could you post the code, put it on your ftp site or email me ? TIA, J. Wesley Cleveland
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