Author: Uri Blass
Date: 01:18:26 01/12/04
Go up one level in this thread
On January 11, 2004 at 20:55:32, Mike Byrne wrote: >On January 11, 2004 at 17:55:11, Uri Blass wrote: > >>On January 11, 2004 at 16:52:09, Robert Hyatt wrote: >> >>>On January 11, 2004 at 15:47:04, Uri Blass wrote: >>> >>>>I do not see a word about promotions in swap.c of Crafty but maybe there is >>>>something that I do not understand. >>>> >>>>Uri >>> >>>Swap() will only find capture promotions. It really doesn't do anything >>>with them, because the value is a pawn, not a queen, and the normal Swap() >>>code handles that just fine. IE if you treat it as simply dxe8, that is >>>good enough, you are winning a piece. If your opponent re-captures, he >>>only gets a pawn, not the queen you promoted to... >> >>If the pawn is pinned you may need to capture with something else. >> >>[D]rn6/P7/K7/8/8/6k1/1Q6/8 w - - 0 1 >> >>If I understand correctly >>SEE of Crafty is going to consider QxN as a bad capture. >> >>Uri > > >sd=1 >Black(1): rn6/P7/K7/8/8/6k1/1Q6/8 w - - 0 1 >White(1): go >end-game phase > clearing hash tables > time surplus 29.75 time limit 22.87 (3:33) > time surplus 29.75 time limit 22.87 (3:33) > depth time score variation (1) > 1 0.00 11.45 1. Qxb8+ Rxb8 2. axb8=Q+ > 1-> 0.00 11.45 1. Qxb8+ Rxb8 2. axb8=Q+ > time=0.00 cpu=100% mat=2 n=39 fh=100% nps=10K > ext-> chk=1 cap=0 pp=0 1rep=0 mate=0 > predicted=1 nodes=39 evals=11 > endgame tablebase-> probes=0 hits=0 > SMP-> split=1 stop=0 data=1/64 cpu=0.00 elap=0.00 > >White(1): Qxb8+ > time used: 0.00 >Black(1): depth=1 is enough here to see here Qxb8+ because after one ply search you have a different position. Uri
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