Author: Uri Blass
Date: 14:37:26 02/09/01
Go up one level in this thread
On February 09, 2001 at 16:54:13, Pete Galati wrote: >On February 09, 2001 at 15:45:05, leonid wrote: > >>On February 09, 2001 at 11:51:37, Pete Galati wrote: >> >>>On February 09, 2001 at 08:40:05, Uri Blass wrote: >>> >>>>On February 09, 2001 at 08:25:02, Hans Havermann wrote: >>>> >>>>>On February 09, 2001 at 06:51:15, leonid wrote: >>>>> >>>>>>>[D]1bqQBnRn/3N2Qb/Q1QN2np/1Q1Q1qpk/4Qqbn/2B1Qrnn/2Q5/K1R5 w - - >>>>> >>>>>Black has too many promotions. :) >>>> >>>>Right. >>>> >>>>Most chess programs cannot analyze positions when black has 7 promotions and 2 >>>>pawns. >>>> >>>>Chessbase programs do not accept the position and the engine is not >>>>important(after Board, Setup position,paste Fen I cannot tell the program ok. >>>> >>>>I think that it is a bug in the chessbase interface because the interface is >>>>made for many engines and it is possible that some of the engines have no >>>>problem to analyze the illegal position. >>>> >>>>I think that the interface should allow putting illegal position in the board >>>>and I do not understand the decision not to allow putting illegal positions. >>>> >>>>Uri >>> >>>Well, look at it this way though, this position crashes Crafty when I paste it >>>into Crafty running in text mode, and I can paste the position into Winboard, >>>but niether TCB nor Crafty will analyze the position once it's there. I suppose >>>I could fix the position so it IS legal, but then it would be a different >>>position. >>> >>>Pete >> >>I have no idea why in Crafty it could be the problem to solve position like >>above. I never used Crafty for this purpose. I used it only for playing chess. >>Great program! But I was very interested to know why many of programs that I >>used around 4 eyars ago crashed on positions, even every modest compared with >>the last one. Now I only have some guessing about what it could be. Maybe some >>programs use some look-up tables that is the beginning for all limitations. >>Maybe number of moves was limited for each ply, taking in consideration that DOS >>was very restrictive system. I just don't know... >> >>Leonid. > >Well, fwiw, I removed one Queen, the one on Wht's 8th rank, and then Crafty >didn't mind the position > >[D]1bq1BnRn/3N2Qb/Q1QN2np/1Q1Q1qpk/4Qqbn/2B1Qrnn/2Q5/K1R5 w - - 0 1 > >but I have no idea how important that Queen was to that position. With the >position like that, Crafty is intent on doing Nxf5 but it hasn't shown me # yet. > >Pete The queen is very important to the solution. The first move of the solution of chest is Qd8xg5+ Chessbase interface is not going to accept not removing black pieces. The reason that chessbase does not accept it is the fact that there are too many black pieces. If you want to get a position that chessbase accept then a good idea is to replace the pawn at g5 by a rook. Uri
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