Author: Robert Hyatt
Date: 20:51:35 08/29/00
Go up one level in this thread
On August 29, 2000 at 23:28:38, stuart taylor wrote: >On August 29, 2000 at 23:19:59, Robert Hyatt wrote: > >>On August 29, 2000 at 19:18:17, Alexander Kure wrote: >> >>>On August 29, 2000 at 13:58:52, Graham Laight wrote: >>> >>>>Firstly, apologies to everyone for dashing off after the last game in the WMCCC. >>>> >>>>It enabled me to get an extra day's holiday with my girlfriend, though, which >>>>was well worthwhile! >>>> >>> >>>Well deserved, Graham! >>>Thanks again for your work. >>> >>>[...] >>> >>>This game clearly showed that Fritz plays in a different league than Crafty! In >>>fact I think this was one of the best games of the WMCCC. >>> >>>Greetings >>>Alex >> >> >>My take on this game is a bit different. I do _not_ want my program to make >>such a sacrifice and then see the eval steadily go _down_ over the next few >>moves. It means one of two things for it to win such a game: >> >>1. The eval is bogus. It is saying "this is bad" when in reality "this is >>good". I don't want that sort of evaluation. >> >>2. The program was lucky. A little luck doesn't hurt. But it doesn't win >>tournaments very often. >> >>Either the eval was wrong, or it was lucky. Neither one leave me feeling like >>"fritz is in a different league than Crafty..." >> >>I suspect white has better moves that might have justified the pessimistic eval >>Fritz had... The right program might have made that sacrifice look as ugly as >>this game made it look brilliant... > >This is what I was asking about. So it was basically chance-like! not a new >weapon! >S.Taylor I believe that this was lucky or unlucky depending on which side you were pulling for. I think, after a fair amount of analysis (head and computer) that had white played Nxe6 (suggested by Uri) that white is simply winning. So there was a good bit of luck here. Why was Crafty moving too quickly? No idea. Why did Fritz play the sac? I think it saw it was losing a pawn, and sometimes a program will see that losing a pawn, or losing a piece for two pawns is the same thing. Usually the latter loses. I believe this game was no exception except that for reasons unknown, Crafty was moving way too quickly. When I set this up and play to this point, I get a target time of almost 3 minutes. Why Crafty moved in way under 1/2 of that is a mystery that I will try to resolve, obviously. I think that 3 minutes would be more than enough to fail low here, and that would give it a _long_ time to find a better move, like Nxe6.
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