Author: Ignacio Santos Crespo
Date: 03:50:11 04/29/05
Go up one level in this thread
On April 28, 2005 at 17:12:13, Dieter Buerssner wrote:
>On April 27, 2005 at 22:15:43, John Merlino wrote:
>
>>On April 27, 2005 at 18:53:52, Daniel Mehrmannn wrote:
>>
>>>Hello all,
>>>
>>>this position was created between Homer 003 vs. Gargamella 0.50 in the
>>>ChessWar F tourney by Olivier Deville:
>>>
>>>[D]1rb3kr/p2q1ppp/1p1N4/3QPP2/8/8/P1P3PP/1R3R1K w - - 1 22
>>>
>>>White won here and i'm pretty sure there is a mate in the air, but
>>>how much moves and the PV. Homer played e6 and that should be the move.
>>>
>>>Other Engines?
>>>
>>>daniel
>>
>>Analysis leads me to believe that 22.e6 is a mate in at most 17 moves. The King
>>(CM9_R1 personality) doesn't report a mate from the initial position in any
>>reasonable amount of time, but I was able to eliminate many potential lines, and
>>came up with this, which I believe is best play:
>>
>>22.e6 Bb7 23.exd7 Bxd5 24.Nc8
>>
>>And now things get a bit fuzzy. Black has 24...h6, 24...Bxg2+ or 24...g5 as
>>possibilities, but I think that 24...h6 holds off mate the longest.
>>
>>So after 24.Nc8, we have 24...h6 25.d8=Q+ Kh7 26.Qxd5, and now things get fuzzy
>>again.
>>
>>Here's the position:
>>
>>[D]1rN4r/p4ppk/1p5p/3Q1P2/8/8/P1P3PP/1R3R1K b - - 0 26
>>
>>After a VERY long think (almost an hour), it sees that 26...f6 will give White a
>>mate in 12, and that there is nothing better. So, that gives us a total of 17
>>moves.
>>
>>Can somebody else do better?
>
>After 26...f6, I get a mate in 10:
>
> 231745058 2:08.2 Mat10 17. 27.Qf7 Rhxc8 28.Rbe1 Rg8 29.Re7 Rbd8 30.Qxf6
> {1081}
>
>Much of the line is hidden due to HTs. The line continues:
>
> 30...Rde8 31.Qg6+ Kh8 32.f6 Rxe7 33.fxe7 b5
> 34.Rf7 a5 35.e8=Q Rxe8 36.Qxg7# {-1081}
>
>At 26...f6, probably chest can solve it, and give a definite answer. I think,
>mate in 10 is optimal, but cannot prove it. Ohh - I used some backward analysis,
>to get this mate in 10. I did not have the patience, to just wait. I also doubt,
>that I'd see a mate score soon, with just waiting.
>
>Regards,
>Dieter
Hello all,
After 26... f6 The King 3.33 sees mate in 10 (56 seconds on Athlon64 3200+):
FEN: 1rN4r/p5pk/1p3p1p/3Q1P2/8/8/P1P3PP/1R3R1K w - - 0 27
The King 3.33:
3 00:00 473 473.000 +14,94 Cc8xa7 Tb8d8 Dd5f7
4 00:00 1.598 1.598.000 +14,95 Cc8xa7 Th8d8 Dd5f7 Td8d6
5 00:00 5.634 281.700 +15,28 Cc8xa7 Th8d8 Dd5f7 Td8d6 Tb1d1
6 00:00 14.420 480.666 +15,22 Cc8xa7 Th8d8 Dd5f7 Td8d2 Df7c7 Tb8e8
Tb1xb6
7 00:00 36.138 451.725 +15,24 Cc8xa7 Th8d8 Dd5c6 Td8d2 Tf1e1 h6h5 Ca7b5
8 00:00 99.895 399.580 +15,61 Cc8xa7 Th8d8 Dd5c6 Tb8a8 Dc6c7 Td8d4
Tb1xb6 Td4a4
9 00:00 189.014 429.577 +15,68 Cc8xa7 Th8d8 Dd5c6 Tb8a8 Dc6c7 b6b5 a2a3
Td8d2 Ca7xb5
10 00:01 558.227 450.183 +15,87 Cc8xa7 Th8d8 Dd5f7 Td8d6 Tf1e1 Tb8g8
Te1e7 Td6d2 Df7xf6 Td2xc2 Df6xb6 Tc2xa2 Db6g6+ Rh7h8 Te7xg7
11 00:03 1.427.741 477.505 +16,19 Cc8xa7 Th8d8 Dd5f7 Td8f8 Df7c7 Tf8e8
Tb1xb6 Tb8xb6 Dc7xb6 Te8e4 Db6c6 Te4e2 Ca7b5
12 00:05 2.706.794 489.474 +16,35 Cc8xa7 Th8d8 Dd5f7 Rh7h8 Df7c7 Td8e8
Tb1xb6 Tb8xb6 Dc7xb6 Te8e4 Ca7c6 Rh8h7 Db6b5 Te4g4
13 00:13 6.757.023 518.972 +16,49 Cc8xa7 Th8d8 Dd5f7 Td8f8 Df7c7 Tf8g8
Tb1xb6 Tb8xb6 Dc7xb6 Tg8e8 a2a4 Te8e4 Db6c6 Te4e2 Ca7b5
14 00:31 17.303.030 557.802 +16,59 Cc8xa7 Th8d8 Dd5f7 Td8f8 Df7c7 Rh7h8
Tb1xb6 Tb8xb6 Dc7xb6 Tf8e8 a2a4 Rh8h7 c2c4 Te8e4 Tf1c1 Rh7g8
14 00:36 20.199.651 550.849 +17,38 Cc8d6 Th8d8 Tf1e1 Td8d7 Dd5c6 Td7d8 Te1e7
Td8g8 Dc6f3 Tb8f8 Te7xa7 Rh7h8 Tb1xb6 Rh8h7
14 00:46 26.507.409 572.020 +19,15 Dd5f7 Th8xc8 Tb1e1 Tc8g8 Te1e7 Tb8d8
Df7xf6 Rh7h8 Df6g6 Td8d7 Te7xd7 a7a6 Dg6xb6 Tg8a8
15 00:56 34.447.805 610.993 +99,81 Dd5f7 Th8xc8 Tb1e1 Tc8g8 Te1e7 Tb8d8
Df7xf6 Rh7h8 Df6g6 Td8e8 Te7xe8 Tg8xe8 Dg6xe8+ Rh8h7 Tf1d1 a7a5 De8g6+ Rh7h8
Td1d8+
16 01:09 45.173.919 651.766 +99,81 Dd5f7 Th8xc8 Tb1e1 Tc8g8 Te1e7 Tb8d8
Df7xf6 Rh7h8 Df6g6 Td8e8 Te7xe8 Tg8xe8 Dg6xe8+ Rh8h7 Tf1d1 a7a5 De8g6+ Rh7h8
Td1d8+
17 02:05 95.943.176 767.729 +99,81 Dd5f7 Th8xc8 Tb1e1 Tc8g8 Te1e7 Tb8d8
Df7xf6 Rh7h8 Df6g6 Td8e8 Te7xe8 Tg8xe8 Dg6xe8+ Rh8h7 Tf1d1 a7a5 De8g6+ Rh7h8
Td1d8+
Ignacio
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.