Author: Uri Blass
Date: 02:36:59 11/28/03
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On November 28, 2003 at 04:56:45, martin fierz wrote: >On November 28, 2003 at 01:21:16, Russell Reagan wrote: > >>I had this position in a game I played tonight. Analyzing it, I found that I >>missed a draw. Ruffian took 9 seconds and 14 plies, while Crafty took 4 minutes >>and 22 plies to see that it was a draw (Athlon 2GHz). Ruffian gives a draw score >>after two repititions, so this might be why. I'm not sure what Crafty does. >> >>[D]8/8/8/1p6/8/8/pq3P2/3k2KQ w - - 0 76 > >i don't know why your crafty needs this long. my stupid engine sees the draw >score after 1 minute on P4 2.4GHz at depth 15. This is the kind of positions that movei does not go deep and after equivalent time I only start depth 9 and at depth 9 it cannot see draw score(at the time of replying it is at depth 10 after more than 7 minutes on p850 and still no 0.00 score). The reasons for the small depth may be that I do too much extensions and the fact that I do not use hash tables for pruning(checks in the qsearch may be also expensive in this position and I will need to check if this is not another reason). What is the level of your engine? Do you test it in games against free winboard chess engines and if you do can you mention engines of similiar strength? Uri
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