Author: Pete Galati
Date: 14:51:25 02/09/01
Go up one level in this thread
On February 09, 2001 at 17:37:26, Uri Blass wrote:
>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+
Ok, I wasn't paying attention to what programs had com up with for a solution.
>
>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.
Crafty wouldn't have noticed that I suppose because the position is Wht to move.
>
>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
But we'd still have to get rid of one Wht Queen though I think. Are any of them
not needed? Crafty did finally see a mate with that Queen missing, but it
doesn't keep Blk in check the whole time.
Pete
8 65:52 Mat09 1. Nxf5 Nhxf5 2. Bxg6+ Kh4 3. Qxh6+
Nh5 4. Be1+ Rg3 5. Qxh5+ Bxh5 6. Qxg3+
Nxg3 7. Qxg5+ Nxg5 8. Qh2+ Kg4 9. Qxg3#
8-> 90:44 Mat09 1. Nxf5 Nhxf5 2. Bxg6+ Kh4 3. Qxh6+
Nh5 4. Be1+ Rg3 5. Qxh5+ Bxh5 6. Qxg3+
Nxg3 7. Qxg5+ Nxg5 8. Qh2+ Kg4 9. Qxg3#
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