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Subject: Re: Starting position to 30 ply

Author: Mike S.

Date: 12:12:41 06/04/01

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On June 04, 2001 at 13:33:08, Graham Laight wrote:

>On June 04, 2001 at 07:01:21, Rudolf Huber wrote:
>(...)
>>My post should say two things:
>>
>>1. mtd(f) is very efficient when the score does not change from one iteration
>>to the other
>>
>>2. You can not win material within the first 30 ply

>More evidence to support the case that chess is ultimately a draw.
>
>Clearly this is not compelling evidence - but the weight of evidence which
>exists now must surely be regarded as being close to "beyond reasonable doubt".

I'm not sure how close to "beyond doubt"... There are many variations in opening
theory, where i.e. one side is a pawn down, but has compensation, or even more
than compensation for it. It can also be the opposite situation: Balanced
material, but one side has an overwhelming positional advantage already, or
decisive attack.

I think 30 ply is an impressive depth, but the pure material evaluation can't
tell us very much, apart from the "naked fact" that no material win can be
forced.

But I'm curious what this kind of 30 ply search would show after a) 1.e4 d5, and
after b) 1.d4 d5 2.c4. In other words, if black can keep the material balance
equal for 15 moves in the Scandinavian defense, and if black can hold the QG
pawn if he wants (something of which I was never quite sure, if he can hold it
or not... of course I know that it's considered to be bad to try it... :o)

Regards,
M.Scheidl



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