Author: Tony Nichols
Date: 12:52:03 12/01/04
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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
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