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Subject: Re: Nobody's perfect - Shredder7.04 announces mate in 0 !?

Author: Uri Blass

Date: 08:12:19 05/13/03

Go up one level in this thread

On May 13, 2003 at 10:19:10, Jorge Pichard wrote:

>On May 13, 2003 at 07:31:32, Uri Blass wrote:
>
>>On May 13, 2003 at 07:13:55, John Boyd wrote:
>>
>>>On May 13, 2003 at 00:56:49, Jouni Uski wrote:
>>>
>>>[D]5bk1/p3p1p1/p3P1P1/p7/p7/8/P7/5K2 w - -
>>>>
>>>>This is one of my oldest test positions with mate in 17 (Ke2). It's still
>>>>unsolved by top pros, but Yace and Crafty can solve it. Interestingly
>>>>Shredder7.04 first says mate in 22 and then mate in 0 (#0) !?!?
>>>>
>>>>Jouni
>>>
>>>My engine (TRACE 1.1.2) running on a P3-600 finds Ke2 Mate16 in less than a
>>>second...  at least its good for one thing... :-)
>>
>>I forgot to say that not exactly.
>>
>>It is mate in 17 so your engine is not so good if it can see mate in 16 that
>>does not exist.
>>
>>Uri
>
>I don't see mate in 17, but in 19 moves. Show me how you can mate in only 17
>moves.
>
>Jorge

Yace can show you very quickly

New game
5bk1/p3p1p1/p3P1P1/p7/p7/8/P7/5K2 w - - 0 1

Analysis by Yace 0.99.56:

1.Ke2
  -+  (-5.24)   Depth: 1   00:00:04
1.Ke2 a3
  -+  (-5.22)   Depth: 2   00:00:04
1.Ke2 a3 2.Ke3
  -+  (-5.17)   Depth: 3   00:00:04
1.Ke2 a3 2.Ke3 a4
  -+  (-5.27)   Depth: 4   00:00:04
1.a3 Kh8 2.Ke2 Kg8
  -+  (-5.24)   Depth: 4   00:00:04
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 5   00:00:04
1.a3 Kh8 2.Ke2 Kg8 3.Kf1 Kh8 4.Ke2 Kg8 5.Kf1
  =  (0.00)   Depth: 5   00:00:04
1.a3 Kh8 2.Ke2
  -+  (-5.14)   Depth: 6   00:00:04
1.a3 Kh8 2.Ke2 Kg8 3.Kf1 Kh8 4.Ke2 Kg8 5.Kf1
  -+  (-5.14)   Depth: 6   00:00:04
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 7   00:00:04
1.a3 Kh8 2.Ke2 Kg8 3.Kf1 Kh8
  =  (0.00)   Depth: 7   00:00:04
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 8   00:00:04  1kN
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 9   00:00:04  1kN
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 10   00:00:04  2kN
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 11   00:00:04  3kN
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 12   00:00:04  4kN
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 13   00:00:04  4kN
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 14   00:00:04  5kN
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 15   00:00:04  6kN
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 16   00:00:04  8kN
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 17   00:00:04  9kN
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 18   00:00:04  11kN
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 19   00:00:04  13kN
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 20   00:00:04  15kN
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 21   00:00:04  19kN
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 22   00:00:04  22kN
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 23   00:00:04  28kN
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 24   00:00:04  34kN
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 25   00:00:04  42kN
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 26   00:00:04  51kN
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 27   00:00:04  64kN
1.a3 Kh8 2.Ke2 Kg8 3.Kf1
  =  (0.00)   Depth: 28   00:00:05  77kN
1.Ke2 a3 2.Kd2 a4 3.Kc3 Kh8 4.Kb4 Kg8 5.Kxa3 Kh8 6.Kxa4 Kg8 7.Ka5 Kh8 8.Kxa6 Kg8
9.Kxa7 Kh8 10.Kb7 Kg8 11.a4 Kh8 12.a5 Kg8 13.a6 Kh8 14.a7 Kg8 15.a8Q
  +-  (6.46)   Depth: 28   00:00:05  77kN
1.Ke2 a3 2.Kd3 a4 3.Kc3 Kh8 4.Kb4 Kg8 5.Kxa3 Kh8 6.Kxa4 Kg8 7.Ka5 Kh8 8.Kxa6 Kg8
9.a4 Kh8 10.a5 Kg8 11.Kxa7 Kh8 12.Kb6 Kg8 13.a6 Kh8 14.a7 Kg8 15.Kb7 Kh8 16.a8Q
  +-  (7.39)   Depth: 28   00:00:05  77kN
1.Ke2 a3 2.Kd3 a4 3.Kc3 Kh8 4.Kb4 Kg8 5.Kxa3 Kh8 6.Kxa4 Kg8 7.Ka5 Kh8 8.Kxa6 Kg8
9.a4 Kh8 10.a5 Kg8 11.Kxa7 Kh8 12.Kb6 Kg8 13.a6 Kh8 14.a7 Kg8 15.Kb7 Kh8
  +-  (7.39)   Depth: 28   00:00:05  77kN
1.Ke2 a3 2.Kd3 a4 3.Kc3 Kh8 4.Kb4 Kg8 5.Kxa3 Kh8 6.Kxa4 Kg8 7.Ka5 Kh8 8.Kxa6 Kg8
9.a4 Kh8 10.a5 Kg8 11.Kxa7 Kh8 12.Kb6 Kg8 13.a6 Kh8 14.a7 Kg8 15.Kc5 Kh8
  +-  (7.48)   Depth: 29   00:00:05  134kN
1.Ke2 a3 2.Kd3 a4 3.Kc3 Kh8 4.Kb4 Kg8 5.Kxa3 Kh8 6.Kxa4 Kg8 7.Ka5 Kh8 8.Kxa6 Kg8
9.a4 Kh8 10.a5 Kg8 11.Kxa7 Kh8 12.Kb6 Kg8 13.a6 Kh8 14.a7 Kg8 15.Kc5 Kh8
  +-  (7.48)   Depth: 30   00:00:05  175kN
1.Ke2 a3 2.Kd3 a4 3.Kc3 Kh8 4.Kb4 Kg8 5.Kxa3 Kh8 6.Kxa4 Kg8 7.Ka5 Kh8 8.Kxa6 Kg8
9.a4 Kh8 10.a5 Kg8 11.Kxa7 Kh8 12.Kb6 Kg8 13.a6 Kh8 14.a7 Kg8 15.Kc5 Kh8
  +-  (7.53)   Depth: 31   00:00:05  239kN
1.Ke2 Kh8 2.Kd3 Kg8 3.Kd4 Kh8 4.Kd5 a3 5.Kd4 Kg8 6.Kc4 a4 7.Kc5 a5 8.Kc6 a6
9.Kb7 Kh8 10.Kb8 Kg8 11.Ka7 Kh8 12.Kb6 Kg8 13.Kxa6 Kh8 14.Kxa5 Kg8 15.Ka6 Kh8
16.Ka7
  +-  (#32)   Depth: 32   00:00:05  244kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Kxa4 Kg8 6.Kxa3 Kh8 7.Ka4 a6 8.a3 Kg8
9.Kxa5 Kh8 10.Kxa6 Kg8 11.Kb6 Kh8 12.a4 Kg8 13.a5 Kh8 14.a6 Kg8 15.a7 Kh8 16.a8Q
  +-  (#18)   Depth: 32   00:00:05  244kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Kxa4 Kg8 6.Kxa3 Kh8 7.Ka4 a6 8.a3 Kg8
9.Kxa5 Kh8 10.Kxa6 Kg8 11.Kb6 Kh8 12.a4 Kg8 13.a5 Kh8 14.a6 Kg8 15.a7 Kh8
  +-  (#18)   Depth: 32   00:00:05  244kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Kxa4 Kg8 6.Kxa3 a4 7.Kxa4 Kh8 8.Ka5 Kg8
9.Ka6 Kh8 10.a4 Kg8 11.a5 Kh8 12.Kxa7 Kg8 13.Kb6 Kh8 14.a6 Kg8 15.a7 Kh8 16.a8Q
  +-  (#18)   Depth: 33   00:00:05  311kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Kxa4 Kg8 6.Kxa3 a4 7.Kxa4 Kh8 8.Ka5 Kg8
9.Ka6 Kh8 10.a4 Kg8 11.a5 Kh8 12.Kxa7 Kg8 13.Kb6 Kh8 14.a6 Kg8 15.a7 Kh8
  +-  (#18)   Depth: 33   00:00:05  311kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 34   00:00:05  334kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 35   00:00:05  355kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 36   00:00:05  378kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 37   00:00:05  406kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 38   00:00:05  436kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 39   00:00:06  466kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 40   00:00:06  496kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 41   00:00:06  527kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 42   00:00:06  559kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 43   00:00:06  589kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 44   00:00:06  620kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 45   00:00:06  651kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 46   00:00:06  682kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 48   00:00:06  744kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 49   00:00:07  775kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 50   00:00:07  806kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 51   00:00:07  837kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 52   00:00:07  868kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 53   00:00:07  899kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 54   00:00:07  930kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 55   00:00:07  961kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 57   00:00:08  1023kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 58   00:00:08  1054kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 59   00:00:08  1085kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 60   00:00:08  1116kN
1.Ke2 a3 2.Kd3 a4 3.Kc4 a5 4.Kb5 Kh8 5.Ka6 Kg8 6.Kxa7 Kh8 7.Kb6 Kg8 8.Kxa5 Kh8
9.Kxa4 Kg8 10.Kxa3 Kh8 11.Kb3 Kg8 12.a4 Kh8 13.a5 Kg8 14.a6 Kh8 15.a7 Kg8
  +-  (#17)   Depth: 61   00:00:08  1147kN

(, eim 13.05.2003)

Uri

• Re: Nobody's perfect - Shredder7.04 announces mate in 0 !? Dieter Buerssner 10:39:55 05/13/03

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