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Subject: Re: Crafty bugs (?)

Author: Bernhard Bauer

Date: 05:53:01 08/24/98

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On August 24, 1998 at 04:57:58, Andreas Stabel wrote:

>I have discovered some small problems with crafty.
>
>1) If a castling leads to a check, crafty does not output the + after
>   the move, i.e. O-O is output and not O-O+.
>
>2) Sometimes crafty does not output the right move list when in analyze
>   mode. Enter crafty and then analyze mode. Type the
>   moves a3, a6 and Nf3. If you now type history you only get the first
>   moves. Below is the output:
>
>               book   0.0s     29%    g6
>analyze.Black(1): a6
>a6
>Black(1): a6
>              clearing hash tables
>              time surplus   0.00  time limit 30.00 (3:00)
>              depth   time  score   variation (1)
>                4->   0.29   0.00   2. Nf3 Nc6 3. Nc3 Nf6
>                5     0.41   0.22   2. Nf3 Nc6 3. Nc3 Nf6 4. e4
>                5->   0.99   0.22   2. Nf3 Nc6 3. Nc3 Nf6 4. e4
>Nf3             6     0.99   1/19   2. Nf3
>White(2): Nf3
>analyze.White(2): White(2): Nf3
>              clearing hash tables
>              time surplus   0.00  time limit 30.00 (3:00)
>              depth   time  score   variation (1)
>hi              5     0.20   4/19   2. ... d5
>Black(1): hi
>    white       black
>  1  a3          ...
>                5     1.09  -0.02   2. ... d5 3. e3 Nc6 4. Bd3 Bg4
>                5->   1.24  -0.02   2. ... d5 3. e3 Nc6 4. Bd3 Bg4
>                6     2.28  -0.32   2. ... d5 3. e3 Bf5 4. Be2 e6 5. O-O
>
>Note that before the "hi" is typed, crafty outputs "Black(1): " , but it
>should have output "Black(2): ".
>
>3) Finally I have a position where crafty does not find a mate in one.
>   Is this a bug or is it nullmove related or something ?
>   The FEN is: 7k/4N3/7K/4N3/8/8/b7/8 w - - 0 5
>   The mating move is N5g6#. By the way this position arise from a nice
>   problem with FEN: 6bk/8/3P2K1/4N3/8/8/2r5/1N6 w - - 0 1
>
>I run crafty on a Windows 95 with EGTB, ROCK opening book and 24Mb (5Mb) hash.
>
>Best regards
>Andreas Stabel

4) Something like
    setboard 8/2B2pPb/7k/4K3/3p2P1/8/8/8 w
    d
    search g8=N+
    move
will not work. Crafty says: Illegal move (ambiguous): g8

5)  setboard 4k3/nnnnnnnn/8/8/8/8/RRRRRRRR/4K3 w
    move
will crash Crafty.

Personally I find 3) the "insufficint material feature" quite annoying
and would be happier whithout it.

Kind regards
Bernhard



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