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Subject: Re: test position. mate in 11

Author: John Merlino

Date: 22:10:09 10/06/01

Go up one level in this thread


On October 07, 2001 at 00:16:35, Slater Wold wrote:

>On October 06, 2001 at 23:07:51, K. Burcham wrote:
>
>>
>>bruce posted a position similiar to this, i modified it for a mate in 11.
>>can your program see this mate in 11.
>>slate if you read this, will you post your analysis.
>>
>>
>> [D] 7b/q7/Pk3p1P/1Pp2pB1/K1P2P2/1Q6/8/8 w - - 0 1
>>
>>
>>kburcham
>
>Here are the "deep" programs:
>
>Deep Fritz - W,S
>7b/q7/Pk3p1P/1Pp2pB1/K1P2P2/1Q6/8/8 w - - 0 1
>
>Analysis by Deep Fritz T29c:
>
>1.h7--
>  ±  (1.28)   Depth: 1/5   00:00:00
>1.h7-- fxg5
>  ±  (1.19)   Depth: 1/5   00:00:00
>1.Bxf6!
>  +-  (2.34)   Depth: 1/5   00:00:00
>1.Bxf6! Bxf6
>  +-  (2.59)   Depth: 1/5   00:00:00
>1.Qd3!
>  +-  (2.66)   Depth: 1/5   00:00:00
>1.Qd3! fxg5
>  +-  (3.16)   Depth: 1/5   00:00:00
>1.Qb2!
>  +-  (3.53)   Depth: 1/5   00:00:00
>1.Qb2! fxg5
>  +-  (3.78)   Depth: 1/5   00:00:00
>1.Bh4!
>  +-  (5.16)   Depth: 1/5   00:00:00
>1.Bh4!
>  +-  (5.50)   Depth: 1/5   00:00:00
>1.Bh4 Kc7
>  +-  (5.53)   Depth: 2/4   00:00:00
>1.Qc3!
>  +-  (5.66)   Depth: 2/4   00:00:00
>1.Qc3! Kc7 2.Bxf6
>  +-  (5.81)   Depth: 2/7   00:00:00
>1.Qc3 Kc7 2.Bxf6
>  +-  (5.81)   Depth: 3/8   00:00:00
>1.Qc3 Qd7 2.Bxf6 Qd1+ 3.Ka3
>  +-  (5.75)   Depth: 4/12   00:00:00  1kN
>1.Qc3!
>  +-  (6.06)   Depth: 5/14   00:00:00  3kN
>1.Qc3! Qe7 2.Qa5+ Ka7 3.b6+ Kb8
>  +-  (6.09)   Depth: 5/16   00:00:00  4kN
>1.Qc3--
>  +-  (5.78)   Depth: 6/17   00:00:00  8kN
>1.Qc3-- Qf7 2.Bh4 Kc7 3.Ka5 Qe6
>  +-  (5.69)   Depth: 6/17   00:00:00  9kN
>1.Qd3!
>  +-  (5.72)   Depth: 6/17   00:00:00  12kN
>1.Qd3! Qe7 2.Bh4 Kc7 3.Qxf5 Kb8
>  +-  (6.09)   Depth: 6/17   00:00:00  16kN
>1.Qd3 Qc7 2.Bh4 Qe7 3.Bf2 Kc7 4.Qxf5
>  +-  (6.16)   Depth: 7/17   00:00:00  24kN
>1.Qd3!
>  +-  (6.47)   Depth: 8/21   00:00:00  40kN
>1.Qd3!
>  +-  (6.78)   Depth: 9/23   00:00:00  79kN
>1.Qd3--
>  +-  (6.47)   Depth: 10/22   00:00:00  141kN
>1.Qd3--
>  +-  (6.47)   Depth: 10/27   00:00:00  168kN
>1.Qd1!
>  +-  (6.50)   Depth: 10/27   00:00:00  227kN
>1.Qd1!
>  +-  (6.81)   Depth: 11/28   00:00:00  437kN
>1.Qd1!
>  +-  (7.13)   Depth: 12/28   00:00:01  1166kN
>1.Qd1! Qe7 2.Bh4 Kc7 3.Qd5 Qe4 4.Qxc5+ Kd7 5.a7 Qc2+ 6.Ka5 Qd2+
>  +-  (10.00)   Depth: 12/30   00:00:02  3318kN
>1.Qd3!
>  +-  (10.03)   Depth: 12/30   00:00:03  3691kN
>1.Qd3! Qe7 2.Bh4 Ka7 3.Qd5 Kb8 4.b6 Kc8 5.Qc6+ Kb8 6.h7 Qf7
>  +-  (13.16)   Depth: 12/30   00:00:03  4505kN
>1.Qd3!
>  +-  (13.47)   Depth: 13/30   00:00:04  5359kN
>1.Qd3! Qe7 2.Bh4 Kc7 3.a7 Kb7 4.b6 Kxb6 5.a8Q Qa7+ 6.Qxa7+ Kxa7
>  +-  (13.84)   Depth: 13/31   00:00:04  5923kN
>1.Qd3!
>  +-  (14.16)   Depth: 14/31   00:00:06  7931kN
>1.Qd3! Qe7 2.Bh4 Kc7 3.a7 Kb7 4.b6 Kxb6 5.a8Q Qa7+
>  +-  (14.47)   Depth: 14/32   00:00:07  8842kN
>1.Qd3!
>  +-  (14.78)   Depth: 15/33   00:00:10  14396kN
>1.Qd3! Qe7 2.Bh4 Kc7 3.a7 Kb7 4.b6 Kxb6 5.a8Q Qa7+
>  +-  (14.94)   Depth: 15/35   00:00:12  17027kN
>1.Qd1!
>  +-  (14.97)   Depth: 15/36   00:00:17  23611kN
>1.Qd1!
>  +-  (15.28)   Depth: 16/35   00:00:20  27501kN
>1.Qd1! Qe7 2.Bh4 Kc7 3.Be1 Kc8 4.Ba5 Qd7
>  +-  (15.88)   Depth: 16/36   00:00:24  33486kN
>1.Qd1!
>  +-  (16.19)   Depth: 17/36   00:00:36  49666kN, tb=2
>1.Qd1! Qe7 2.Bh4 Kc7 3.Be1 Kc8 4.Ba5 Qd7
>  +-  (17.88)   Depth: 17/39   00:01:01  87895kN, tb=4
>1.Qd3!
>  +-  (17.91)   Depth: 17/41   00:01:46  153538kN, tb=4
>1.Qd3! Kc7 2.Qd5 Qb6 3.Qf7+ Kc8 4.a7 Qb7 5.Qe6+ Kd8 6.Bxf6+ Bxf6
>  +-  (19.84)   Depth: 17/41   00:03:42  330718kN, tb=9
>1.Qd3!
>  +-  (20.16)   Depth: 18/39   00:04:08  369617kN, tb=20
>
>(W,  06.10.2001)
>
>After 15 minutes, the eval window hadn't updated, so I stopped it.
>
>
>Shredder 5.32 - W,S
>7b/q7/Pk3p1P/1Pp2pB1/K1P2P2/1Q6/8/8 w - - 0 1
>
>Analysis by Shredder 5.32:
>
>1.Qb4 cxb4 2.Kxb4 fxg5
>  -+  (-2.65)   Depth: 1/2   00:00:00
>1.Qb4 fxg5
>  -+  (-3.47)   Depth: 1/2   00:00:00
>1.Qb4
>  -+  (-5.85)   Depth: 1/2   00:00:00
>1.Qc3 Qf7 2.Qa5+ Ka7 3.b6+ Ka8
>  +-  (6.62)   Depth: 1/2   00:00:00
>1.Qc3 Qd7 2.Qa5+ Ka7 3.Bh4
>  +-  (6.43)   Depth: 1/2   00:00:00
>1.Qc3 Qd7 2.Qa5+ Ka7 3.Bh4
>  +-  (6.43)   Depth: 2/4   00:00:00
>1.Qc3 Qd7 2.Qa5+ Ka7 3.Bh4 Qd1+ 4.Ka3
>  +-  (6.43)   Depth: 3/6   00:00:00
>1.Qc3 Qd7 2.Bxf6 Bxf6 3.Qxf6+ Ka7
>  +-  (6.43)   Depth: 4/8   00:00:00
>1.Qc3 Qd7 2.Bxf6 Bxf6 3.Qxf6+ Ka7
>  +-  (6.43)   Depth: 5/10   00:00:00
>1.Qc3 Qd7 2.Bxf6 Bxf6 3.Qxf6+ Ka7
>  +-  (6.54)   Depth: 6/12   00:00:00  5kN
>1.Qc3 Qf7 2.Qa5+ Ka7 3.b6+ Kb8 4.a7+ Ka8 5.Qb5 Kb7 6.Qa5 Qxc4+ 7.Ka3
>  +-  (6.51)   Depth: 7/14   00:00:00  21kN
>1.Qc3 Qe7 2.Qa5+ Ka7 3.b6+ Kb8 4.Qb5 Qd8 5.a7+ Kb7 6.Bh4 Qd6
>  +-  (6.27)   Depth: 8/16   00:00:00  76kN
>1.Qf3 Qc7 2.Bh4 Ka7 3.Qd5 Qb6 4.h7 Kb8 5.Qxf5
>  +-  (6.28)   Depth: 8/16   00:00:00  136kN
>1.Qf3 Qd7 2.Bh4 Ka7 3.Qd5 Qxd5 4.cxd5 c4 5.d6
>  +-  (6.46)   Depth: 8/16   00:00:00  166kN
>1.Qd3 Qc7 2.Bh4 Ka7 3.Qxf5 Qh7 4.Qxh7+ Ka8 5.Qxh8+ Ka7 6.Bxf6
>  +-  (6.47)   Depth: 8/16   00:00:00  208kN
>1.Qd3 Qc7 2.Bh4 Ka7 3.Qxf5 Qh7 4.Qxh7+ Bg7 5.Qxg7+ Kb8 6.Qb7#
>  +-  (6.82)   Depth: 8/16   00:00:00  217kN
>1.Qd3 Qe7 2.Bh4 Ka7 3.Qxf5 Kb6 4.Qc8 Qe4 5.Qxh8 Qxc4+ 6.Ka3 Qxf4 7.Qxf6+ Qxf6
>  +-  (7.12)   Depth: 8/16   00:00:00  241kN
>1.Qd3 Qe7 2.Bh4 Ka7 3.Qxf5 Qd6 4.Qh7+ Kb6 5.Bg3 Qd8
>  +-  (7.37)   Depth: 9/18   00:00:00  276kN
>1.Qd3 Qe7 2.Bh4 Ka7 3.Qxf5 Qc7 4.Bf2 Kb8 5.Bxc5
>  +-  (7.58)   Depth: 9/18   00:00:00  303kN
>1.Qd3 Qe7 2.Bh4 Qc7 3.Bf2 Qxf4 4.Qd8+ Ka7 5.Bxc5#
>  +-  (7.77)   Depth: 10/20   00:00:00  438kN
>1.Qd3 Qe7 2.Bh4 Qc7 3.Bf2 Qxf4 4.Qd8+ Qc7 5.Qxh8 f4 6.Qxf6+ Ka7 7.b6+ Kb8
>  +-  (8.02)   Depth: 11/22   00:00:01  825kN
>1.Qd3 Qe7 2.Bh4 Qc7 3.Bf2 Ka7 4.Bxc5+ Qb6 5.Bxb6+ Kxb6
>  +-  (8.52)   Depth: 11/22   00:00:01  943kN
>1.Qd3 Qe7 2.Bh4 Kc7 3.Qd5 Qe4 4.Qxc5+ Kd8 5.Qf8+ Kc7 6.Qxh8 Qxc4+ 7.Ka3 Qc5+
>8.Ka2 Qc4+ 9.Ka3 Qc5+
>  +-  (9.39)   Depth: 11/22   00:00:02  1407kN
>1.Qd3 Qe7 2.Bh4 Kc7 3.a7 Kb7 4.b6 Qe8+ 5.Ka5 Qc6 6.Qd8 Qe8 7.a8Q#
>  +-  (9.64)   Depth: 12/24   00:00:05  2826kN, tb=1
>1.Qd3 Qe7 2.Bh4 Kc7 3.a7 Kb7 4.b6 Qe8+ 5.Ka5 Qc6 6.Qd8 Qe8 7.Qxe8 Bg7
>  +-  (10.14)   Depth: 12/24   00:00:05  3186kN, tb=1
>1.Qd3 Qb8 2.Bh4 Kc7 3.Qd5 Qb6 4.Be1 Kb8 5.Ba5 Qxa5+ 6.Kxa5 Ka7 7.Qxc5+ Kb8
>8.Qxf5
>  +-  (15.10)   Depth: 12/24   00:00:13  7683kN, tb=26
>1.Qd3 Qb8 2.Bh4 Kc7 3.Qd5 Qb6 4.Be1 Kb8 5.Ba5 Bg7 6.hxg7 Ka7
>  +-  (15.35)   Depth: 13/25   00:00:23  13465kN, tb=45
>1.Qd3 Qb8 2.Bh4 Kc7 3.Qd5 Qb6 4.Be1 Kb8 5.Ba5 Bg7 6.hxg7 Ka7
>  +-  (15.85)   Depth: 13/25   00:00:24  14178kN, tb=50
>1.Qd3 Kc7 2.Qd5 Qb6 3.Bh4 Bg7 4.hxg7 Kb8
>  +-  (19.42)   Depth: 13/25   00:00:31  18274kN, tb=94
>1.Qd3 Qb8 2.Bh4 Ka7 3.Qd7+ Qb7 4.axb7 Bg7 5.Qxg7 Kb6
>  +-  (19.66)   Depth: 14/26   00:00:49  29251kN, tb=192
>1.Qd3 Qb8 2.Bh4 Ka7 3.Qd7+ Qb7 4.axb7 Kb8 5.Qxf5 Kxb7 6.Bxf6 Bg7 7.Bxg7 Kc7
>  +-  (19.91)   Depth: 15/27   00:01:31  53465kN, tb=873
>1.Qd3 Qb8 2.Bh4 Ka7 3.Qd7+ Qb7 4.axb7 Kb8 5.Qxf5 Kxb7 6.Bxf6 Bg7 7.Bxg7
>  +-  (20.41)   Depth: 15/27   00:01:44  61439kN, tb=1391
>
>(W,  06.10.2001)
>
>
>Once again, eval window did not update in 10 minutes, so I stopped it.
>
>Sorry I didn't have more time.  I was trying to do something when I read the
>post, and *thought* I'd have enough time to solve it.
>
>Slate

This begs the question: How can DF get to depth 18/39 and Shredder get to depth
15/27 and neither of them see a Mate in 11 (21 plies away)? Or am I missing
something? Or is it truly not a Mate in 11?

jm



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