Author: Dieter Buerssner
Date: 14:12:13 04/28/05
Go up one level in this thread
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
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