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Subject: Re: Mate in 19, which program?

Author: Uri Blass

Date: 07:12:07 03/08/02

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On March 08, 2002 at 09:22:58, Ed Schröder wrote:

>[d]4r3/p1p1pPp1/P1P1P1P1/5K2/3p2P1/7p/3P1ppr/3R1nkq w - - id M19;
>
>I came across this beauty, mate in 19 moves. Rebel has no clue.
>
>Ed

I could solve it by my head in some minutes(I used the program only as a
chessboard to go backward and forward)

I believe that this position should be easy for computers if people only write
the right programs(something that I did not do).

singular extension may help but they should be implemented correctly in order
not to do the program significantly slower in other positions.

1.fxe8N d3 2.Nf6 gxf6(exf6 do the solution shorter) 3.g5 fxg5 4.g7 g4 5.g8N g3
6.Nf6 exf6 7.Kg6 f5 8.e7 f4 9.e8N f3 10.Nd6 cxd6 11.c7 d5 12.c8N d4 13.Nb6 axb6
14.a7 b5 15.a8N b4 and here white can choose between 16.Nc7 and 16.Nb6

Uri

• Re: Mate in 19, which program? Vincent Diepeveen 12:41:45 03/09/02
  • Re: Mate in 19, which program? Uri Blass 14:38:57 03/09/02
    • Re: Mate in 19, which program? Vincent Diepeveen 07:47:09 03/10/02
      • Re: Mate in 19, which program? Uri Blass 08:19:43 03/10/02

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