Author: James Robertson
Date: 09:56:21 02/25/99
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On February 24, 1999 at 18:24:40, William Bryant wrote: >On February 24, 1999 at 04:48:50, Ulrich Tuerke wrote: > >> >>On February 24, 1999 at 04:36:47, Ulrich Tuerke wrote: >> >>I use the 2 positions below to test correct work of my hash algos. You need >>correctly working hash to solve this. May be they are useful for you. >> >>8/k7/3p4/p2P1p2/P2P1P2/8/8/K7 w - - 0 1 id "HASH-01";c0 "Only Kb1! wins"; >>8/1p5k/1P1p4/3p4/3Pp2p/2K1P2p/7P/8 w - - 0 1 id "HASH-02";c0 "Kb2! draws"; > > >I tried these on my program. I get Kb1 on ply 19 at 0:19 with a score of > +2.04. On lower plies it chooses Kb2. I disabled everything (extensions, pruning, the works) and ran these positions with just hash tables and alpha-beta. I get the first position on ply 20 after 20 seconds. > >On the second I get Kb2 in less than a second, at ply 13. I have to wait for 2 seconds and ply 15 to solve. This is on my P233 with 2 ^ 18 positions in my table. What do some of the other programs get? How big are you hash tables? You seem to be doing a bit better plywise, which worries me. Any comments would be welcome. James > >I assume that as long at it > finds the score when deep enough then the hash tables are ok. > >Note, I haven't added Null moves or search extensions yet to this is simple >alpha beta with hash table. > >William >wbryant@ix.netcom.com
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