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Subject: Re: GTA 15 - Ruffian

Author: Stephen Ham

Date: 08:47:54 01/09/03

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On January 09, 2003 at 10:52:50, Christophe Drieu wrote:

>PIII 500 Mhz
>Gambit Tiger Aggressive Hash = 24 Mb
>Ruffian 1.0.1 Hash = 32 Mb
>Own books
>Engine research tool
>
>Blitz 5 minutes + 0
>
>GTA15   101*11110111100111  13.5
>Ruffian 010*00001000011000   4.5

Dear Christophe,

Thanks for this interesting post. But, since I'm a computer "dummy", I'm unclear
on a few minor points. As a "dummy", I'm probably going to write somethine
really stupid.

1) I find it odd that there were no draws out of 18-games.

2) Why was Ruffian given more RAM? While a larger RAM amount is often
desireable, I understand that in blitz chess, it shoud be keep relatively small
in order to speed up the search. So for a fair comparison, shouldn't the engines
have the exact same RAM? Maybe 8 MB is too small a figure to be concerned about,
but in principle, I think that all variables should be held identical and
constant for both engines in order to make a valid test.

3) Given your experience with Ruffian (hopefully you have experience at longer
time controls), do you see evidence of a playing style? For example, is it
aggressive like Junior or solid like Shredder 5.32 and CT 14? Does it exhibit
any clear weaknesses relative to other engines, such as weaker than normal
engame play or worse than normal problems in closed positions?

4) Does Ruffian's evaluation function seem generally accurate (e.g. CT 14 or
Fritz 7) or does it vary a lot from ply to ply and or move to move (Nimzo 7.32
and Shredder 7).

Thanks in advance.

All the best,

Stephen



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