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Subject: Re: Ruffian's Evaluation [with diagrams]

Author: Joachim Rang

Date: 10:38:11 02/27/04

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On February 27, 2004 at 11:12:05, Anthony Cozzie wrote:

>On February 27, 2004 at 10:16:55, Ricardo Rego wrote:
>
>>Hi
>>
>>Several messages in the last few days are handling the analysis / evaluation
>>issues. I believe I am one of the Ruffian's customers that still have doubts
>>about the 'power' of its game.
>>
>>Considering the following positions and the following evals, I got an conclusion
>>that Ruffian is not a good evaluator. Checkout (and compare) the scores provides
>>by Ruffian against other engines... Ruffians thinks different. Simple and Plain.
>>
>>Ok, the positions have a particular and similar pattern, but I found out the
>>same thing with other setups...
>>
>>R2
>>
>>
>[D]1rb1n1k1/5r1p/p2p1pp1/3P4/q1P1PQ2/3RN3/P5PP/KN4R1 w - - 0 31
>>
>>
>>Analysis: 120 seconds
>>PIII 700 Mhz - 32Mb Hash Tables
>>
>>Engine		Best Move	Relative White Score
>>----------------------------------------------------
>>CM9000		Nd2		0,94
>>Shredder 5	Nd2		0,26
>>Fritz 7		Nd2		0,31
>>SOS 4		Nd2		0,31
>>Ruffian 2.10	Nd2		-0,51  *****
>>
>>
>>
>[D]1rb1n1k1/1r5p/p2p1p2/2PP2p1/1q2P3/1N1RNQ2/P5PP/K1R5 b - - 0 35
>>
>>
>>Analysis: 120 seconds
>>PIII 700 Mhz - 32Mb Hash Tables
>>
>>Engine		Best Move	Relative White Score
>>----------------------------------------------------
>>CM9000		..Qa3		1.56
>>Shredder 5	..dxc5		0,76
>>Fritz 7		..dxc5		1.16
>>SOS 4		..Qa3		1,10
>>Ruffian 2.10	..dxc5		-0,70 *****


at first glance it see4ms in both positions black has rooks and Queens near the
white king. It seems that Ruffian evaluates such kind of king_unsafety rather
strong. Nothing unusual I would say.

I'll test with some other engines though.

regards Joachim



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