Author: Uri Blass
Date: 00:42:42 02/06/04
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On February 06, 2004 at 02:15:35, Tord Romstad wrote: >On February 05, 2004 at 15:15:47, Uri Blass wrote: > >>I think that you underestimate your engine. >>It seems to get similiar depth to crafty. >> >>For example in the following position it got depth 11 even in blitz 4+2 > >Yes, 11 plies in blitz games is not unusual. But 11 plies in Gothmog and 11 >plies in Crafty is not the same. I do much more forward pruning and depth >reductions than Bob, and fewer extensions. In non-tactical positions like >the one you give, my qsearch is also considerably smaller than Bob's (I think). > >Tord I do not think that there is a big difference. Crafty searches bigger tree because it searches more irrelevant lines. I guess that the main advantage of Crafty relative to Gothmog when you use one processor is superior evaluation(Gothmog's evaluation is more complex but bigger is not always better and not having bugs or some too optimistic scores of gothmog that lead to wrong sacrifices can be more important and it is possible that Gothmog can get crafty level if you only reduce the big positional scores that encourage it to sacrifice). I do not think that gothmog see less than crafty in the relevant lines(crafty has bigger tree but it proves nothing). I know that test suites are no proof but results of the gcp test suite give me the impression that cases when Gothmog can see more than crafty are not rare. Uri
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