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Subject: Re: a simple position (some engines for Fritz including crafty cannot solve)

Author: Steffen Jakob

Date: 23:05:49 03/15/99

Go up one level in this thread


On March 15, 1999 at 19:30:46, John Merlino wrote:

>On March 14, 1999 at 10:24:26, blass uri wrote:
>
>>R4b1q/5Pp1/Pk4Pp/3K3P/7P/8/8/8 w - - 0 1
>>
>>white wins by 1.a7
>>Genius3 finds it in less than 1 second
>>
>>unfortunately some engines for Fritz5 cannot solve it(crafty16.5's move is Ke6
>>and the evaluation is 0.00 at depth 19,exchess2.51's move is Ke6 and the
>>evaluation is 0.00 at depth 14 )

[...]

>Chessmaster 6000 announces mate in 8 in 10 seconds on a PII-400.

Hossa sees that a7 wins in 12 seconds (but no mate):

 depth  value    time    nodes pv
     1   -465    0.00        3 1.a8xf8 h8xf8
   2/1   -254    0.01        5 1.a7
     2   -255    0.02      136 1.a7 b6c7
     3   -255    0.03      251 1.a7 b6c7
   9/4   -258    0.08     3707 1.d5e4 b6c5 2.a7 c5d6
  11/4   -257    0.09     4140 1.d5c4 b6c6 2.a7 c6d6
     5   -257    0.13     5694 1.d5c4 b6c7 2.a7 c7d6
     6   -255    0.20    11222 1.d5c4 b6a5 2.a7 a5b6
     7   -254    0.32    20226 1.d5c4 b6a5 2.c4d5 a5b5 3.a7 b5b4
  11/7   -245    0.56    41350 1.d5e6 b6b5 2.e6d7 b5c5 3.d7c7 c5d4
     8   -239    0.75    57463 1.d5e6 b6b5 2.e6d7 b5a5 3.d7c7 f8d6 4.c7b7 d6f8
     9   -239    1.33   110889 1.d5e6 b6b5 2.e6d7 b5a5 3.d7c6 a5a4 4.c6c7 a4b4
! 2/10    1/2    3.34   294193 1.d5e6 b6b5 2.e6d7 b5b6 3.d7e6
! 2/11    651   11.94  1138141 1.a7 b6b7 2.a8d8 b7xa7 3.d5c6 f8d6 4.d8xh8 d6e7
                               5.c6d5 a7a6 6.f7f8Q e7xf8 7.h8xf8
!   12    760   15.47  1454857 1.a7 b6b7 2.a8d8 b7xa7 3.d5c6 f8d6 4.d8xh8 d6e7
                               5.h8g8 e7b4 6.g8xg7
! 2/13   2411   52.47  4704611 1.a7 b6b7 2.a8d8 b7xa7 3.d5c6 h8h7 4.g6xh7 f8c5
                               5.c6xc5 a7a6 6.h7h8Q a6b7 7.f7f8Q

Greetings,
Steffen.



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