Author: Robert Hyatt
Date: 15:13:27 09/30/99
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On September 30, 1999 at 16:12:27, Helmut Conrady wrote: >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 I did and posted the output. It announces mate in 14 instantly and plays the move Kxd4 when doing so... I can't reproduce your behavior at all. It sounds like either (a) you do _not_ have kppkp or if you do the name is wrong, the file is corrupted or something else is wrong with it. I have _all_ of the files here and it has no problems with the position before Kxd4 or after the position. It says mate no matter what...
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