Author: Uri Blass
Date: 01:32:56 12/02/04
Go up one level in this thread
On December 01, 2004 at 15:52:03, Tony Nichols wrote: >On December 01, 2004 at 15:31:34, John Merlino wrote: > >>On December 01, 2004 at 14:42:06, Tony Nichols wrote: >> >>>On December 01, 2004 at 14:28:44, John Merlino wrote: >>> >>>>On December 01, 2004 at 14:06:54, Tony Nichols wrote: >>>> >>>>>On December 01, 2004 at 13:16:06, Dann Corbit wrote: >>>>> >>>>>>On December 01, 2004 at 10:13:56, Tony Nichols wrote: >>>>>> >>>>>>>I was looking at a study in chessbase 8 that is a mate in three. Unable to solve >>>>>>>it myself I fired up Shredder 8. To my surprise Shredder claimed it was a mate >>>>>>>in 5!? Deep Fritz 8 also said mate in 5. When I played the key move both engines >>>>>>>saw the mate in 2! Other engines found the mate in 3 immediately(Hiarcs 9, Chess >>>>>>>Tiger 15, Gambit Tiger 2.0, Crafty 19.17 etc.). If someone would tell me how to >>>>>>>post the position I will. Has anyone else had similiar problems? >>>>>> >>>>>>What is the position you are looking at? >>>>>Hi Dan >>>>>I don't know how to post the position. If you tell me how I will post it. >>>>>Regards >>>>>Tony >>>>>P.S. it is a study by Milan Vukcevich >>>> >>>>You can just describe the position (which pieces are on which squares, and whose >>>>side to move it is) and somebody else can convert it to the proper format. >>>> >>>>Or, if you know how to convert the position into a FEN string, just put a line >>>>in your post that has a [D] at the beginning and then paste the FEN string >>>>immediately after it. That will do the trick. >>>> >>>>jm >>>ok here goes [D]3K1B2/2pPPp2/7R/2k2r2/7q/P2Q4/8/8 w - - 0 1 >>>wKd8,Qd3,Bf8,Rh6,Pa3,d7,e7/bKc5,Qh4,Rf5,Pc7,f7 >> >>CM9000 also finds it in a handful of milliseconds. It is possible, since some >>solution paths require underpromotions (e.g. 1.Ra6 Qc4 2.e8=N+! Kb5 3.Nxc7#), >>that this could be the reason that some engines don't find the mate in 3. >> >>jm > > Interestingly enough all my UCI engines find it immediately in Frtiz 8 GUI. >Only native chessbase engines have a problem. >Regards Tony It has nothing to do with UCI Movei also may not find the shortest mate because it stops to search after finding mate and does not care to look for a shorter mate. Uri
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