Author: blass uri
Date: 03:38:27 12/17/99
Go up one level in this thread
On December 17, 1999 at 04:42:42, Tina Long wrote: >On December 15, 1999 at 13:08:20, Enrique Irazoqui wrote: > >>On December 15, 1999 at 11:44:52, Torstein Hall wrote: >> >>>Take the following position and setup on your PC: >>> >>>4b3/1r4k1/p3pr2/1p1pPp2/PPpP1Pp1/2P3Pp/K6P/8 w - - 0 1 >>> >>>Every human would play 1.a5 without thinking, but your chessprogram plays >>>1.exf6+??? It may be wrong to call a program stupid but..... >>> >>>Torstein >>> >>>( So far I have only tried it on Fritz 6 and Hiarcs 7.32 ) >> >>I tried for about half a minute most of the programs I have and they all take >>the rook. They are incredibly stupid, but they think the same of us for not >>seeing instantly that this position is a mate in 74. >> >>8/8/8/8/2R1k3/2K5/1P6/3r4 b - - 0 1 >> >>Enrique > >Hi Enrique, >I pasted the above into H732 with tablebases turned on. >0 seconds, announces mate in 74, and thought/searched no further. > >In Analysis mode I keep pushing MoveNow to watch the mate materialise. >From about move 56 onwards (I went to move 96 enthralled) it never proceeds but >moves back & forth announcing #18, #18, #17, #17, #18, #18, #17 ........ >All found in no time, but no further searching goes on. > >Maybe H732 would finally move on to the actual mate in an attempt to avoid 3fold >repetition. I believe that the problem is that hiarcs732 needs all the tablebases to finish the mate and if it has not all the tablebases it does not know that promoting the pawn is a winning move. The CD does not have all the tablebases and hiarcs does not understand that it does not get closer to mate. It is interesting to know how many rating points hiarcs lost in games because of this problem. I guess that not much because in many cases the opponent resigned before the mistake happened. This problem was also a problem of crafty but Bob fixed it. Uri
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.