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Subject: Re: Arasan-Postmodernist match

Author: Uri Blass

Date: 14:05:53 03/07/04

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On March 07, 2004 at 16:46:28, Andrew Williams wrote:

>On March 07, 2004 at 10:24:47, Jon Dart wrote:
>
>>I ran a 40 move/40 minute match between Postmodernist 1.010a and Arasan 7.4.
>>Hardware was an XP2500+, 64 MB Hash for Arasan, 44MB for PM. Arasan lost this
>>match, +3, -10, =7. Games are available at
>>
>>http://www.arasanchess.org/pm.pgn
>>
>>I haven't analyzed the games in detail. My general impression was that PM gained
>>greater mobility in several games and was able to win "positionally". For
>>example, in game 4, PM got doubled rooks and had the better position for most of
>>the game, but really won in the endgame where it was able to out-manouver Arasan
>>and win material.
>>
>>Game 18 looks like an opening book problem (18 .. Ne8 is the standard move, but
>>isn't in Arasan's small book).
>>
>>--Jon
>
>Hi Jon,
>
>Thanks for this report. Speaking of book issues, I have been experimenting with
>an improved "preferred" book for PostModernist. I have essentially got rid of
>the lines which I had been adding because I think PM has done Ok with them at
>ICC. Instead I have been inserting "bog-standard" lines. All this was done on
>Peter Berger's advice. The results have been *ASTONISHING*. For example, the
>current match score is:
>
>improvedpreferred 108.5 - 61.5 standardpreferred
>
>The previous match score was 158 - 119 standardpreferred before I stopped it.
>
>I would NEVER have imagined a result like it, and it has been VERY easy to do
>this.
>
>Andrew

I do not understand what was so easy in changing the book.

What exactly did you change?
What is bog-standard lines?

Uri



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