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Subject: Re: Testposition - The Assault

Author: Uri Blass

Date: 16:30:09 03/15/01

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On March 15, 2001 at 17:48:34, Dan Andersson wrote:

>Ain't you the pessimist. I do believe club level players might see the kill.

I think that I am club level player(my rating is close to 2000 and even after
knowing that Rd7 is winning I do not see a forced win for white without the help
of a chess program.

White has to sacrifice a lot of pieces in order to win.
Humans usually prune these lines.

The main line after 1.Rd7 Qxa1 begins with:
2.Rxg7+ Kxg7 3.Bh6+ Kh8 4.Ng6+ hxg6 5.fxg6

White needs to analyze also 4...Kg8 when 5.Qg4 or 5.Nxf8 is a forced mate.

These quite moves at move 5(White does not threat check) after a lot of
sacrifices are too much for club players and I do not believe that club players
can see it when they play 1.Rd7 unless they gamble in sacrifice that they did
not check.

Gambling with a sacrifice make sense only when there is not a good logical
alternative but in this case it is clear that 1.Rac1 is a good logical
alternative.

Uri



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