Author: Rafael Andrist
Date: 02:49:26 10/13/01
Go up one level in this thread
On October 13, 2001 at 05:21:54, Rafael Andrist wrote:
>On October 12, 2001 at 13:01:35, Dann Corbit wrote:
>
>>Four positions from a pawn test suite I am working on...
>>The first three have clear, alternate checkmates.
>>The last one, I have not been able to solve yet (maybe just really hard).
>>
>>[D]3k4/2p5/1pKp4/p2P4/2P5/P7/1P6/8 w - - bm c5; id "J&S45.10"; c0 "This one is
>>questionable.";
>
>analysis by Wilhelm
> 13 4s 0.06 124227 4680 b2-b4 a5xb4 a3xb4 Kd8-c8 Kc6-b5
>Kc8-d8 Kb5-a4 Kd8-e7 Ka4-b3 Ke7-f6 Kb3-c3 Kf6-e5 Kc3-d3
> 14 11s 0.08 298967 12811 c4-c5 b6xc5 Kc6-b5 Kd8-d7 a3-a4
>c5-c4 Kb5xa5 c7-c6 d5xc6+ Kd7xc6! Ka5-b4 d6-d5 a4-a5 Kc6-b7 Kb4-c5
> 15 21s 0.08 612393 21205 c4-c5 b6xc5 Kc6-b5 Kd8-d7 a3-a4
>c5-c4 Kb5xa5 c7-c6 d5xc6+ Kd7xc6! Ka5-b4 d6-d5 a4-a5 Kc6-b7 Kb4-c5
> 16 38s 0.49 1127757 43197 c4-c5 b6xc5 Kc6-b5 Kd8-d7 a3-a4
>c5-c4 Kb5xa5 c7-c6 d5xc6+ Kd7xc6! Ka5-b4 d6-d5 a4-a5 Kc6-d6 a5-a6 Kd6-c6 a6-a7
>
>Wilhelm seems to prefer c5, but the score isn't convincing.
>
Later it went for Kb7, with a score of 0.85. After doing some pv moves and going
back again etc. I got the following line, which seems winning.
1. Kc6-b7 {20/31/36 0.85} Kd8-d7 {16/24/26 0.85} 2. a3-a4 {18/27/29 0.85}
Kd7-d8 {18/28/30 0.87} 3. c4-c5 {17/27/30 0.87} b6xc5 {16/26/29 0.87} 4.
Kb7-a6 {15/20/23 0.87} Kd8-d7 {15/20/25 0.87} 5. Ka6-b5 {16/25/27 1.71}
Kd7-c8 {16/26/30 1.76} 6. Kb5xa5 {16/28/31 1.78} Kc8-b8 {16/25/28 1.80} 7.
Ka5-b5 {17/28/30 2.19} Kb8-b7 {18/28/32 3.84}
Rafael B. Andrist
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