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Subject: Re: All Instant Players in CM9K and CM10 Are...

Author: John Merlino

Date: 11:10:09 07/19/04

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On July 19, 2004 at 03:44:44, Daniel Jackson wrote:

>Patzers:)
>
>Here I win with mate in 18 moves and my play is lazy, not good play, still it's
>enough to kill instant movers:)
>
>[Event ""]
>[Site ""]
>[Date "2004.7.19"]
>[Round ""]
>[White "Jackson"]
>[Black "Vlad"]
>[TimeControl "300"]
>[Result "1-0"]
>
>1.e4 Nc6 2.d4 e5 3.d5 Nce7 4.c4 Ng6 5.Nc3 Bb4 6.Bd3 Nf6 7.Ne2 O-O 8.Bg5
>h6 9.h4 hxg5 10.hxg5 Ng4 11.Nf4 Nxf4 12.Qxg4 Nxd3+ 13.Kf1 d6 14.Qh5 Bh3
>15.Rxh3 f5 16.g6 Qh4 17.Rxh4 Bxc3 18.Qh7# 1-0
>
>My computer is slow but even if it were very fast, I doubt the difference would
>be significant, when CM moves so quickly.
>
>Daniel
>
>P.S.
>
>Now to see if I can mate Vlad (1861), grin...in 15 moves or less;-)

The problem move is 13...d6. CM_SKR shows an eval of -2.95 for Black with
13...Nf4 before that move, and a Mate in 5 for White after that move!

And, as another user pointed out, it is the limited search depth that causes
this (and the instant moves). Vlad's search depth is limited to 3 plies. Vlad
also has a big mobility value, which is why he probably preferred playing d6 to
open the diagonal for the bishop and attack your queen. He just couldn't see the
mate a mere 9 plies away.

jm



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