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Subject: Re: So whats the word on Shredder 9's elo?

Author: Steve Glanzfeld

Date: 05:33:10 05/01/05

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On April 30, 2005 at 19:52:25, Odd Gunnar Malin wrote:

>(...)
>        Shredder 9  Tiger 2004  Gandalf 6    Me     Max
>Game 1   39 (75%)    28 (54%)    34 (65%)  32 (62%)  52
>Game 2   42 (67%)    38 (60%)    41 (65%)  28 (44%)  63
>Game 3   42 (63%)    31 (46%)    30 (45%)  31 (46%)  67
>Game 4   46 (53%)    46 (53%)    34 (39%)  42 (48%)  87
>Game 5   45 (78%)    40 (69%)    34 (59%)  32 (55%)  58

Were the openings excluded? I could not find this on that website. Are these
master games (which?).

Anyway, during master's games, especially positional ones, it is impossible that
it is a series of (nearly) "perfect" moves. There will always be positions where
a couple of moves are nearly equal. We know that it's practically impossible to
find good positional tests (except when they include material sacrifices for a
"convincing" positional return).

I don't think this method is a good idea to test computerchess programs... too
much luck or mischance involved, i.e. when the suggested move is missed because
of 0.0x evaluation difference.

Also, my first doubt would be if the suggested moves are really the best anyway.
Compared to Shredder 9, many masters are just patzers! :-)

Another problem is possible transpositions. I positional games, there often is
not a specific move order required. So, maybe one program scores good by going
A-B-C, another one wants to do B-A-C resulting in the same position and
therefore scores much less...?

Steve



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