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Subject: Re: Interesting position

Author: Hans Havermann

Date: 06:50:30 08/15/99

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On August 13, 1999 at 03:10:30, James Robertson wrote:

>My program sees neither the draw nor the win but picks Kh1 after 11 plies for
>some positional reason. What do other programs think?

This is MacChess down to 17-plies:

09/01|00:00:11|     3055413| -300| Rf2 Bxg5 Qxg5+ Kh8 Rd8 Ra7 Qf6+ Kg8
                                   Rxf8+ Qxf8 Qxe5 a5 Bc4
09/02|00:01:08|    21604601|   +0| Kh1 Bxg5 Qxg5+ Kh8 Rd8 Rxd8 Qf6+ Kg8
                                   Qg5+ Kf8 Qxd8+ Kg7 Qg5+ Kf8 Qd8+
10/01|00:01:13|    23320852|   +0| Kh1 Bxg5 Qxg5+ Kh8 Rd8 Rxd8 Qf6+ Kg8
                                   Qg5+ Kf8 Qxd8+ Kg7 Qg5+ Kf8 Qd8+
11/01|00:02:18|    36229553|   +0| Kh1 Bxg5 Qxg5+ Kh8 Rd8 Rxd8 Qf6+ Kg8
                                   Qg5+ Kf8 Qxd8+ Kg7 Qg5+ Kf8 Qd8+
12/01|00:04:12|    61555235|   +0| Kh1 Bxg5 Qxg5+ Kh8 Rd8 Rxd8 Qf6+ Kg8
                                   Qg5+ Kf8 Qxd8+ Kg7 Qg5+ Kf8 Qd8+
13/01|00:07:12|   109129559|   +0| Kh1 Bxg5 Qxg5+ Kh8 Rd8 Rxd8 Qf6+ Kg8
                                   Qg5+ Kf8 Qxd8+ Kg7 Qg5+ Kf8 Rd1 Bb7
                                   Qf6+ Kg8 Qg5+ Kh8 Qf6+ Kg8
14/01|00:14:07|   202935071|   +0| Kh1 Bxg5 Qxg5+ Kh8 Rd8 Rxd8 Qf6+ Kg8
                                   Qg5+ Kf8 Qxd8+ Kg7 Qg5+ Kf8 Rd1 Bb7
                                   Qf6+ Kg8 Qxe6+ Kh8 Qf6+ Kg8 Qe6+
15/01|03:53:39|  4167378922| +217| Kh1 Bxg5 Qxg5+ Kh8 Rd8 Rxd8 Qxd8+ Kg7
                                   Qg5+ Kh8 Rd1 Qf8 Rd8 Qxd8 Qxd8+ Kg7
                                   Qe7+ Kg6 Qe8+ Kg5 Qxc6 Rb8 Bxa6 Bxa6 Qxa6
16/01|07:52:25|  8536862445| +217| Kh1 Bxg5 Qxg5+ Kh8 Rd8 Rb8 Bxa6 Rxd8
                                   Qxd8+ Kg7 Bxc8 Qc4 Qg5+ Kf8 Rc1 Qd5
                                   Qf6+ Ke8 Bxe6 Qd2 Rxc6
17/01|28:30:44| 29643915121| +240| Kh1 Bxg5 Qxg5+ Kh8 Rd8 Rb8 h3 Rxd8
                                   Qxd8+ Kg7 Qc7+ Bd7 Qxb8 Qe3 Rd1 Qxe2
                                   Rxd7+ Kh6 Qf8+ Kg5 Qd8+ Kf4 Qh4+ Ke3



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