Author: Steffen Jakob
Date: 01:04:08 03/05/99
Go up one level in this thread
On March 05, 1999 at 03:48:47, Ernst A. Heinz wrote:
>On March 05, 1999 at 03:18:25, Steffen Jakob wrote:
>
>>On March 05, 1999 at 02:51:09, blass uri wrote:
>>
>>>
>>>On March 05, 1999 at 01:04:23, Steffen Jakob wrote:
>>>
>>>>On March 04, 1999 at 09:03:23, Steffen Jakob wrote:
>>>>
>>>>>Hi all,
>>>>>
>>>>>I added the "bm" attributes to the endgame test collection which Jouni posted.
>>>>
>>>>Jouni, position #1 is a draw. Kc2 doesn´t win. I also noticed that other
>>>>positions have more than one solution.
>>>>
>>>>Greetings,
>>>>Steffen.
>>>
>>>This is the relevant position
>>>5k2/8/8/8/8/2P5/8/3K4 w - - 0 1
>>>Kc2 is winning.
>>>For example 1.Kc2 Ke7 2.Kb3 Kd6 3.Kb4 Kc6 4.Kc4
>>>
>>>I think that tablebases can tell in how many moves it is a mate.
>>
>>Bob confirmed that it is a tablebase draw. The key squares of the pawn c3 are
>>b5,c5,d5.
>
>The position that Jouni and Uri gave is a win -- mate in 22.
>
>Maybe you got the FEN wrong in your file, Steffen?
Oooops, yes, it was a copy-paste bug!
I had
k2/8/8/8/8/2P5/8/3K4 w
instead of
5k2/8/8/8/8/2P5/8/3K4 w
I am sorry!
Now Hossa sees the win:
depth value time nodes pv
1 142 0.02 2 c4
2 132 0.02 14 c4 f8e7
3 164 0.02 42 c4 f8e7 c5
4 164 0.02 108 c4 f8e7 c5
5 170 0.02 278 c4 f8e7 c5 e7e6 d1e2
6 170 0.02 567 c4 f8e7 c5 e7e6 d1e2
7 147 0.03 1512 c4 f8e7 d1e2 e7d6 e2e3 d6c5 e3d3
7 150 0.04 2123 d1e2 f8e7 e2e3 e7d6 e3d4 d6c6 c4
8 150 0.04 2794 d1e2 f8e7 e2e3 e7d6 e3d4 d6c6 c4
9 181 0.06 5218 d1e2 f8e7 e2e3 e7d7 e3d4 d7d6 c4 d6e6
c5
10 181 0.12 7796 d1e2 f8e7 e2e3 e7d7 e3d4 d7d6 c4 d6e6
c5
11 184 0.18 12455 d1e2 f8e7 e2e3 e7d7 e3d4 d7d6 c4 d6c6
c5 c6d7
12 184 0.24 17221 d1e2 f8e7 e2e3 e7d7 e3d4 d7d6 c4 d6c6
c5 c6d7 d4e5
13 185 0.35 28558 d1e2 f8e7 e2d3 e7d7 d3c4 d7d6 c4b5 d6d5
c4 d5d6 c5 d6c7 c6 c7d6 b5b6
13 190 0.42 34053 d1c2 f8e7 c2b3 e7d6 b3c4 d6c6
14 190 0.48 40436 d1c2 f8e7 c2b3 e7d6 b3c4 d6c6 c4d4 c6d6
15 190 0.57 50445 d1c2 f8e7 c2b3 e7d6 b3c4 d6c6 c4d4 c6d6
16 190 0.68 63859 d1c2 f8e7 c2b3 e7d6 b3c4 d6c6 c4d4 c6d6
c4 d6c6 c5 c6d7 d4d5 d7e7 c6
17 198 1.04 112582 d1c2 f8e7 c2d3 e7d7 d3d4 d7d6 c4 d6c6
c5 c6c7 d4d5 c7d7 c6 d7e7 d5e5 e7e8
e5d5
18 201 1.18 128243 d1c2 f8e7 c2d3 e7d7 d3d4 d7d6 c4 d6c6
c5 c6c7 d4d5 c7d7 c6 d7e7 d5e5 e7e8
e5d6 e8d8 c7
19 201 1.54 179500 d1c2 f8e7 c2b3 e7d7 b3b4 d7d6 b4b5 d6d5
c4 d5d6 c5 d6c7 c6 c7c8 b5c5 c8c7
20 201 1.74 209134 d1c2 f8e7 c2b3 e7d7 b3b4 d7d6 b4b5 d6c7
b5c5 c7d7 c5d5 d7c7 c4 c7d7 c5 d7c7
c6
21 201 1.87 227469 d1c2 f8e7 c2b3 e7d7 b3b4 d7d6 b4b5 d6c7
b5c5 c7d7 c5d5 d7c7 c4 c7d7 c5 d7c7
c6 c7d8 d5d6 d8c8 c7
! 23 1460 2.62 351242 d1c2 f8e7 c2b3 e7d7 b3b4 d7d6 b4b5 d6c7
b5c5 c7d7 c5b6 d7d6 c4 d6d7 c5 d7c8
b6c6 c8d8 c6b7 d8e7 c6 e7f6 b7b8
! 24 5944 3.25 453235 d1c2 f8e7 c2b3 e7d7 b3b4 d7d6 b4b5 d6c7
b5c5 c7d7 c5b6 d7d6 c4 d6d7 c5 d7c8
b6c6 c8d8 c6b7 d8d7 c6 d7e6 c7 e6d5
c7c8Q
25 5944 3.42 479439 d1c2 f8e7 c2b3 e7d7 b3b4 d7d6 b4b5 d6c7
b5c5 c7d7 c5b6 d7d6 c4 d6d7 c5 d7c8
b6c6 c8d8 c6b7 d8d7 c6 d7e6 c7 e6d5
c7c8Q
26 5946 3.87 553519 d1c2 f8e7 c2b3 e7d7 b3b4 d7d6 b4b5 d6c7
b5c5 c7d7 c5b6 d7d6 c4 d6d7 c5 d7c8
b6c6 c8d8 c6b7 d8d7 c6 d7e6 c7 e6d6
c7c8Q d6d5 b7b6
27 5946 4.07 584250 d1c2 f8e7 c2b3 e7d7 b3b4 d7d6 b4b5 d6c7
b5c5 c7d7 c5b6 d7d6 c4 d6d7 c5 d7c8
b6c6 c8d8 c6b7 d8d7 c6 d7e6 c7 e6d6
c7c8Q d6d5 b7c7
28 5948 4.6 674593 d1c2 f8e7 c2b3 e7d7 b3b4 d7d6 b4b5 d6c7
b5c5 c7d7 c5b6 d7d6 c4 d6d7 c5 d7c8
b6c6 c8d8 c6b7 d8d7 c6 d7e6 c7 e6d6
c7c8Q d6d5 b7c7 d5e5 c7c6
29 5950 5.29 791243 d1c2 f8e7 c2b3 e7d7 b3b4 d7d6 b4b5 d6c7
b5c5 c7d7 c5b6 d7d6 c4 d6d7 c5 d7c8
b6c6 c8d8 c6b7 d8d7 c6 d7e6 c7 e6d6
c7c8Q d6d5 c8f5 d5d4 b7c6 d4c4 f5e5
30 5950 5.78 864464 d1c2 f8e7 c2b3 e7d7 b3b4 d7d6 b4b5 d6c7
b5c5 c7d7 c5b6 d7d6 c4 d6d7 c5 d7c8
b6c6 c8d8 c6b7 d8d7 c6 d7e6 c7 e6d6
c7c8Q d6d5 c8f5 d5d4 f5f4 d4d5 b7b6 d5e6
b6c5
31 5952 7.48 1101056 d1c2 f8e7 c2b3 e7d7 b3b4 d7d6 b4b5 d6c7
b5c5 c7d7 c5b6 d7d6 c4 d6d7 c5 d7c8
b6c6 c8d8 c6b7 d8d7 c6 d7e6 c7 e6d6
c7c8Q d6d5 c8f5 d5d4 b7c6 d4c4 f5e5 c4d3
c6d5
32 5954 11.01 1622670 d1c2 f8e7 c2b3 e7d7 b3b4 d7d6 b4b5 d6c7
b5c5 c7d7 c5b6 d7d6 c4 d6d7 c5 d7c8
b6c6 c8d8 c6b7 d8d7 c6 d7e6 c7 e6d6
c7c8Q d6d5 c8f5 d5d4 f5f4 d4d5 b7b6 d5e6
b6c5 e6e7 c5d5
33 5954 12.56 1862375 d1c2 f8e7 c2b3 e7d7 b3b4 d7d6 b4b5 d6c7
b5c5 c7d7 c5b6 d7d6 c4 d6d7 c5 d7c8
b6c6 c8d8 c6b7 d8d7 c6 d7e6 c7 e6d6
c7c8Q d6d5 c8f5 d5d4 f5f4 d4d5 b7b6 d5e6
b6c5 e6e7 c5d5
34 5964 24.48 3571209 d1c2 f8e7 c2b3 e7d7 b3b4 d7d6 b4b5 d6c7
b5c5 c7d7 c5b6 d7d6 c4 d6d7 c5 d7c8
b6c6 c8d8 c6b7 d8d7 c6 d7e6 c7 e6d6
c7c8Q d6d5 c8g4 d5c5 g4e4 c5d6 b7c8 d6c5
c8c7
35 5964 27.05 3968972 d1c2 f8e7 c2b3 e7d7 b3b4 d7d6 b4b5 d6c7
b5c5 c7d7 c5b6 d7d6 c4 d6d7 c5 d7c8
b6c6 c8d8 c6b7 d8d7 c6 d7e6 c7 e6d6
c7c8Q d6d5 c8f5 d5d4 f5f4 d4d5 f4e3 d5d6
e3d4 d6e6 d4e4 e6d6 b7c8
36 5972 51.99 7887594 d1c2 f8e7 c2b3 e7d7 b3b4 d7d6 b4b5 d6c7
b5c5 c7d7 c5b6 d7d6 c4 d6d7 c5 d7c8
b6c6 c8d8 c6b7 d8d7 c6 d7e6 c7 e6d5
c7c8Q d5e4 c8g4 e4e3 g4g3 e3e4 b7c6 e4d4
g3f4 d4d3 f4f3 d3d4 f3e2 d4c3 e2e3
Computed move : d1c2
Steffen.
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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