Author: Tina Long
Date: 04:03:41 12/17/99
Go up one level in this thread
On December 17, 1999 at 06:38:27, blass uri wrote: >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 Thank's Uri, that's sensible & logical, & now I don't have to worry any more. I'm gonna stick the F5 "talk CD" back in, my games very rarely involve tablebases, and I like being insulted in that sultry German accent. Ta, Tina
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