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Subject: Re: Avoid perpetual check?

Author: Stuart Cracraft

Date: 21:49:45 09/02/04

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On September 02, 2004 at 22:14:42, David Dahlem wrote:

>Interesting position posted on r.g.c.c. Which engines avoid 1.h7, and how long
>does it take to avoid this move which leads to a perpetual check?
>
>[d]3R2nk/r5p1/6PP/3NK3/8/8/8/8 w - - 0 1
>
>Regards
>Dave

GA cannot find it in under 3 minutes on this box.

 3/19  h6h7  0.01 5755     2357 h6h7 a7e7 e5d4 e7e1
 4/19< h6h7  0.03 5505     5682 h6h7 a7e7 e5d4 e7e1
 4/19  h6h7  0.03 5505     5908 h6h7 a7e7 e5d4 e7e8 d8e8
 5/19  h6h7  0.04 5505     9484 h6h7 a7e7 e5d4 e7e8 d8e8
 6/20< h6h7  0.14 5255    50148 h6h7 a7e7 e5d4 e7e8 h7g8Q e8g8 d8g8 h8g8 d4e5 g8
f8 e5d4 f8e8
 6/21  h6h7  0.34 3076   122738 h6h7 a7e7 e5d4 e7e4 d4c5 e4e8 h7g8Q e8g8 d8g8 h8
g8 c5d4 g8f8
 7/25  h6h7  0.54 3076   198655 h6h7 a7e7 e5d4 e7e4 d4c5 e4e8 h7g8Q e8g8 d8g8 h8
g8 c5d4 g8f8
 8/25  h6h7  1.18 3076   439765 h6h7 a7e7 e5d4 e7e4 d4c5 e4e8 h7g8Q e8g8 d8g8 h8
g8 c5d4 g8f8 d4e5 f8e8 e5d4
 9/29  h6h7  3.80 3072  1339967 h6h7 a7e7 e5d4 e7e4 d4c5 e4e8 h7g8Q e8g8 d8g8 h8
g8 d5f4 g8f8 f4e6 f8g8 c5d4 g8h8 d4e5
10/29  h6h7  4.07 3072  1428702 h6h7 a7e7 e5d4 e7e4 d4c5 e4e8 h7g8Q e8g8 d8g8 h8
g8 d5f4 g8f8 f4e6 f8g8 c5d4 g8h8 d4e5
11/36  h6h7 18.17 3074  5947693 h6h7 a7e7 e5d4 e7e4 d4c5 e4e8 h7g8Q e8g8 d8g8 h8
g8 c5c6 g8f8 c6d6 f8e8
12/36  h6h7 19.88 3074  6492580 h6h7 a7e7 e5d4 e7e4 d4c5 e4e8 h7g8Q e8g8 d8g8 h8
g8 c5c6 g8f8 c6d6 f8e8
13/37  h6h7 129.63 3077 41964702 h6h7 a7e7 e5d4 e7e4 d4c5 e4e8 h7g8Q e8g8 d8g8 h
8g8 c5c6 g8f8 c6d7 f8g8 d7e7 g8h8 d5f6 g7f6 e7f6 h8g8
14/37  h6h7 142.78 3077 46464809 h6h7 a7e7 e5d4 e7e4 d4c5 e4e8 h7g8Q e8g8 d8g8 h
8g8 c5c6 g8f8 c6d7 f8g8 d7e7 g8h8 d5f6 g7f6 e7f6 h8g8



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