Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Mate in ?? moves

Author: John Merlino

Date: 19:15:43 04/27/05

Go up one level in this thread


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?

jm



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.