Author: Bas Hamstra
Date: 09:26:00 01/18/02
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On January 18, 2002 at 02:47:27, Tony Werten wrote: >On January 17, 2002 at 11:37:49, Bas Hamstra wrote: > >>On January 17, 2002 at 11:19:40, Gian-Carlo Pascutto wrote: >> >>>On January 17, 2002 at 11:18:05, Bas Hamstra wrote: >>> >>>>Played Leila/Crafty/Yaces/Tigers/Fritz/Hossa 15/0 and 30/0 at ICC: >>>> >>>>statistics for TaoYin(C) On for: 0 Idle: 0 >>>> >>>> rating [need] win loss draw total best >>>>Standard 2534 12 5 3 20 2534 (17-Jan-2002) >>>> >>>> 1: Chess program Tao 5.00 >>>> 2: Athlon 1.4 >>>> 3: Bas Hamstra (bas.hamstra@wxs.nl) >>>> >>>>At these rapid tc's it does ok so far. Hardware was mostly comparable (only >>>>Hossa on a 800 Mhz machine). At first sight it seems to do not bad at all >>>>against Crafties and Yaces on equal hardware. It might very well be totally >>>>different at longer time controls, no idea. >>> >>>Are you doing checks in the quiescent search again? :) >>> >>>-- >>>GCP >> >>Well, yes :-) Since I got used to that years ago, I cannot understand how the >>others do so well without it. For me the whole "mini-qsearch with futility >>pruning" concept is one big myth. At some points I actually agree with Vincent. > >:) > >Have a question that appears to me every time the question "Do you do checks" >raised. Does this mean you force the oppo to search all moves when he's in >check or do you search checkgiving moves as well in quies ? You can do only "evasions" or you can do checkgiving moves, in which case you must also do evasions. I do checkgiving moves. The worst IMO is doing neither together with FP pruning in the qsearch. It misses so much that I think the depth you gain by this is mostly "optical". Pruning SEE<0 is excellent, but FP sucks. Compare FP with lazy eval handling things *accurately*. When a FP cut is "right", lazy eval would have cut it also, and the only thing you gain is a recursive call to quiesce() and a lazy eval. That won't buy you a lot of depth. Best regards! Bas.
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