Author: Rafael Andrist
Date: 10:05:02 10/27/01
Go up one level in this thread
On October 26, 2001 at 17:40:52, Uri Blass wrote: >On October 26, 2001 at 11:24:58, Rafael Andrist wrote: > >>On October 26, 2001 at 08:21:04, Uri Blass wrote: >> >>>[D]8/5P2/4K2k/8/1P2p2p/p7/6R1/5r2 b - - 0 55 bm h3 >>> >>>Fritz7 played 56...e3 and lost against Shredder5.32 when 56...h3 is enough for a draw. >> >>There must be a bug in Fritz7, I don't think this is only an overestimation of >>passed pawns. >> >>Wilhelm needs 2 sec (on PII, 400 Mhz) and 5 plys to see that h3 is drawn (+0.01) >>and that e3 loses (+0.94). At higher depths is dislikes it even more. >> >>Rafael B. Andrist > >If there is a bug in Fritz7 this bug is common also to comet > >Comet needs almost a minute to find the winning move after e3 > [...] > >The following position after 1...e3 2.Ke7 h3 3.Rg1 e2 4.f8Q+ Rxf8 5.Kxf8 >demonstrates the problem. >Fritz believes at small depthes that black has a better position and that the >passed pawns of black are equal more than the rook. > >It needs depth 9 to see white's advantage and it means big depth from the root >position >New position >[D]5K2/8/7k/8/1P6/p6p/4p3/6R1 b - - 0 1 > [...] > >Uri Ok, it really seems that they both give an enormous bonus for passers. Another possibility is still that there's some dubious pruning (futility in Q-search?) which truncates the result. Rafael B. Andrist
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.