Author: blass uri
Date: 23:35:22 01/05/99
Go up one level in this thread
On January 05, 1999 at 21:02:35, Matthew Herman wrote: >On January 05, 1999 at 17:33:37, Enrique Irazoqui wrote: > >>On January 05, 1999 at 16:34:27, blass uri wrote: >> >>>This is the position from game 13 of enrique's games: >>>8/8/2k3P1/p5r1/K7/8/2B5/8 w - - 0 1 >>> >>>black last move was kc5-c6 >>> >>>and my Junior5 prefers 79.Bd3 at depth 20 and at bigger depthes >>> >>>In enrique's games Junior5 chose 79.Bb3 with evaluation -1.12 >>>and my Junior5 gives 79.Bd3 with evaluation -0.xx at depth 20 and at bigger >>>depthes >>> >>>What is the reason for this >>> >>>Is it a bug in the Autoplayer or another reason? >> >>Amir can answer better than me. I don't know why a given program plays a given >>move at a given moment. Right now I can't check this out because I would have to >>stop playing the remaining matches. Once the tournament will end, in about 2 >>weeks, I'll be more than glad to analize this position with J5. >> >>>Another problem is that games are adjudicated too early >>> >>>game 146 between tiger11.7.5 and Rebel10 was adjudicated as a draw in the >>>following position >>> >>>8/7k/3R4/7P/6K1/4b3/8/8 w - - 0 1 >>> >>>Is it a draw by tablebases? >> >>Tiger and Rebel don't use tablebases. I adjudicated this game because no >>progress was being made. Again, I can replay from this position when the >>tournament will be finished. >> >>Enrique >> >>>I think that even if the result is positive the programs should play it because >>>black may do a mistake. >>> >>>The fact that the programs see no plan to win does not prove that it will be a >>>draw. >>> >>>I saw cases when programs succeed in losing dead draw positions. >>> >>>Uri > > >The position 8/8/2k3P1/p5r1/K7/8/2B5/8 w - - 0 1 is also a win after 1. Bb3, >Rxg6 as given by Ken Thompson's tablebases (for instance 2. Kxa5 ?? leads to >mate in 15 for black (and is also found as a strong position (+5.00 after a few >seconds from Fritz5.32))) > >After that black is either mating or wins the bishop in 30 moves .. Bb3 Rxg6 were the game moves but the question is if black wins after Bd3(The move of my Junior5). I think that using crafty with tablebases may help. Bb3 was a mistake because after Rxg6 there is no practical chance for white. Uri
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