Author: Ed Schröder
Date: 20:06:10 08/26/00
Go up one level in this thread
On August 26, 2000 at 21:08:37, Robert Hyatt wrote: >On August 26, 2000 at 11:05:24, walter irvin wrote: > >>On August 26, 2000 at 09:21:15, Robert Hyatt wrote: >> >>>On August 26, 2000 at 09:16:50, Uri Blass wrote: >>> >>>>I tried this position from the game century3-crafty17.11 >>>> >>>>[D]rnbqk2r/pp1p1ppp/4pn2/4P3/1b1N4/2N5/PPP2PPP/R1BQKB1R b KQkq - 0 1 >>>> >>>>Crafty17.13 played 6...Qc7 >>>> >>>>I gave my Crafty17.11 as engine for Hiarcs with 128 Mbyes hash time control of 4 >>>>hours/60 moves >>>>(I guess that this time control is similiar to 2 hours/60 moves on the alpha) >>>> >>>>My Crafty17.11 changed its mind in the last second at depth 12 from 6..Qc7(0.15 >>>>pawn advantage) to the better move 6...Nd5(0.16 pawns advantage). >>>> >>>>I am interested to know crafty17.13's opinion. >>>>Can crafty17.13 avoid 6...Qc7 at depth 12? >>>> >>>>Uri >>> >>> >>>It avoids it by depth=10. The problem was that the mode we were using forced it >>>to play Qc7 as it was a book move. Somehow we followed a very rarely played >>>line, but until I get the log files from Graham I can't tell exactly why. I >>>did notice a pretty significant CAP score that might have pulled it down that >>>line erroneously... >> >>what was the speed relitive x86 for the alpha you used .would it have been >>faster if you could have gotten similar hardware that deep junior had at >>dortmund ??what nps was you seeing on the alpha . > > >We were doing about 400K nps. My quad xeon does about 1M, for reference. > >Speed wasn't the issue here however, it was simply following a bad book line >until it was too late... But 6..Qc7? came not from the book but from the Crafty engine. In this game the Crafty book did not work. Ed
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