Author: Helmut Conrady
Date: 13:12:27 09/30/99
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On September 30, 1999 at 12:52:46, Robert Hyatt wrote: >On September 30, 1999 at 09:52:37, Helmut Conrady wrote: > >> >> >>I think I´ve found a little Tablebase-Bug in Crafty 16.15. Look at this >>position for example: >> >>wKe5, e2, d2; bKa8, d5. >> >>After Kd5: there is a postion with PP vs P on >>the board and (with installesd tablebases!) I expected Crafty to show a >>mate in several moves. But he >>is calculating and calculting and shows after minutes something about >>+10. >> >>After Kd5: he announces a correct mate. This phenomenon took place when >>there is a pawn at the row next to the black pawn (Example: black f-pawn >>with >>white e or/and g-pawn) and the white pawn is at its beginning field. >>When >>you move this white pawn one or two squares above Crafty has no problem >>with showing the mate. >> >>Is it a problem of Crafty of 16.15 or a problem belonging to Craftys >>running under the Fritz GUI? >> >>Best wishes >> >>Helmut > > >I don't understand what you are asking. Are you using "analysis mode"? If so, >it _must_ search from the current position before it can get a tablebase hit. >And Kxd5 will definitely produce a mate in 14 score if you ask it to search >from the position you posted... > >I don't see how you would get a score for the position _prior_ to playing Kd5, >since it is white's move, and it has to search some move before it can probe >the databases... I ve tried to explain it exactly. When in the first position a white pawn stands on its first square Crafty isn t able to announce a mate (the Tb PP vs P is installed!) like Hiarcs or Comet B 04 do. When I put the white pawn e2 to e3 Crafty has no problems to find a Mate. Please try it out. Helmut
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