Author: Peter Fendrich
Date: 13:24:44 09/03/04
Go up one level in this thread
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
On my laptop Terra needs 2 1/2 seconds to find the draw.
Start Analyze
3 0.01 304 1601 h7 Re7+ Kf4 Re4+ Kg3 Re8 hxg8=Q+ {H}
4 0.07 474 4241 h7 Re7+ Kd6 Re8 hxg8=Q+ Rxg8 Rd7
5 0.14 397 10336 h7 Re7+ Kf4 Re8 hxg8=Q+ Rxg8 Rd7 Re8
6 0.19 397 12192 h7 Re7+ Kf4 Re8 hxg8=Q+ Rxg8 Rd7 Rf8+ Rf7 Re8
7 0.29 391 38075 h7 Re7+ Kf4 Re8 hxg8=Q+ Rxg8 Rd7 Rb8 Ke5 Rb2
8 0.44 382 92431 h7 Re7+ Kd4 Re4+ Kd3 Re8 hxg8=Q+ Rxg8 Rd7 Rb8 Kd4
Rb3
9 0.60 282 141839 h7 Re7+ Kf4 Re4+ Kf5 Rf4+ Ke6 Re4+ Kf7 Rf4+ Ke8
Re4+ Kf8 Nh6 Rd7 Nf5
10 0.93 247 282646 h7 Re7+ Kd6 Re6+ Kc5 Rc6+ Kd4 Rc4+ Ke5 Re4+ Kf5
Rf4+ (Kf5e6 Rf4e4)
11 2.27 0 994710 h7 Re7+
11 13.90 3 7206846 hxg7+ Kxg7 Rd6 Ra5 Kd4 Nh6 Re6 Nf5+ Ke4 Nh4 Rd6
Nxg6 Kf5
11 24.92 65 13143672 Ne3 Ra6 hxg7+ Kxg7 Nf5+ Kxg6 Rxg8+ Kh7 Rg7+ Kh8
Ne7 Kxg7 Kf4 Ra3 (Ne7c6)
11 56.90 119 29923204 Nf4 Ra5+ Ke6 Ra6+ Kf5 Ra5+ Kg4 gxh6 Ne6 Re5
(Rd8e8 Re5e4)
11 1:03 120 33295025 Rc8 gxh6 Nf6 (Ra7e7 Ke5f5)
11 1:11 202 37980683 Ke4 gxh6 Nf6 Rg7 Kf5 h5 Kg5 h4 Nh5 Re7 Kxh4 Re3
11 1:13 232 38889651 Kf5 gxh6 Nf6 Rg7 Rf8 h5 Kg5 h4 Nxg8 Rxg8 Rf4 Rd8
Rxh4+ Kg8
12 1:14 232 39139950 Kf5 gxh6 Nf6 Rg7 Rf8 h5 Kg5 h4 Nxg8 Rxg8 Rf4 Rd8
Rxh4+ Kg8
13 1:29 233 46828330 Kf5 gxh6 Nf6 Ra5+ Kf4 Kg7 Nxg8 Kxg6 Ne7+ Kh5 Rf8
Rg5 Kf3 Re5 Re8 (Kh5g5)
14 1:51 234 58118857 Kf5 gxh6 Nf6 Ra5+ Kf4 Kg7 Nxg8 Kxg6 Ne7+ Kh5 Rd3
Ra4+ Kf5 Rb4 Rd6 Rb5+ Nd5 Rb2
/Peter
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