Author: Matthew Herman
Date: 05:08:34 01/06/99
Go up one level in this thread
On January 06, 1999 at 02:35:22, blass uri wrote: > >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 Actually Bb3 isn't totally bad as KR+ Rookpawn vs KB is notoriously hard to win if you dont have the tablebase..
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