Author: Robert Hyatt
Date: 14:04:27 06/12/01
Go up one level in this thread
On June 12, 2001 at 16:02:09, Uri Blass wrote:
>This position is from a game of Fritz6 that was posted by James walker
>
>[D]8/8/P2k4/1P6/2P5/K7/8/1r6 b - - 0 1
>
>Deep Fritz(without null move pruning) says Kd7 mate in 32 at depth 20)
>
>I gave it the following position
>
>[D]8/8/Pk6/1P6/2P5/1K6/2r5/8 b - - 0 1
>
>and the game moves that lead to the first diagram:
>Rc1 Kb4 Rb1+ Ka3 Kc7 Ka4 Kd6 Ka3
>
>Deep Fritz used 128 Mbytes hash and tablebases including KR vs KPP.
>
>
>Can your program find the forced mate?
Yes:
(2) 19-> 3:05 -5.54 1. ... Kd7 2. Ka4 Kc7 3. c5 Ra1+ 4.
Kb4 Kb8 5. Kc4 Rc1+ 6. Kd5 Ka7 7. Kd6
Rb1 8. c6 Kb6 9. c7 Rc1 10. c8=Q Rxc8
11. a7 Ra8 12. Kd5 Rxa7
20 3:05 ++ 1. ... Kd7!!
20 3:14 -Mat29 1. ... Kd7 2. Ka4 Kc7 3. Ka5 Rc1 4.
b6+ Kc6 5. b7 Kc7 6. Kb4 Ra1 7. Kb5
Ra2 8. c5 Ra1 9. b8=Q+ Kxb8 <HT>
(4) 20-> 4:10 -Mat29 1. ... Kd7 2. Ka4 Kc7 3. Ka5 Rc1 4.
b6+ Kc6 5. b7 Kc7 6. Kb4 Ra1 7. Kb5
Ra2 8. c5 Ra1 9. b8=Q+ Kxb8 <HT>
Seems that black is totally winning here...
>
>Uri
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