Computer Chess Club Archives




Subject: Re: Secrets of Rybka and Fruit from my point of view

Author: Uri Blass

Date: 02:19:07 12/16/05

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On December 16, 2005 at 03:43:13, Robert Allgeuer wrote:

>On December 16, 2005 at 00:56:04, Zappa wrote:
>>Rybka: I'm starting to think that a lot of Rybka's strength is tactical.  Try
>>that baby out on a few test positions some time.  For example, the rapid TC CEGT
>>list has Rybka 55 rating points ahead of Fruit, while the slower BFF list has
>>Rybka only 15 rating points ahead of Fruit.
>It is stated very often that tactical strength is more important for Blitz than
>for longer time controls. While intuitively I would agree, was there any study
>done that supports this point?
>If true it would follow that positionally strong engines are relatively weaker
>in Blitz. Is this really true?

I think that tactical advantage is result of pattern recognition that is
positional understanding.

I can show example from humans.

intelligent beginners without positional understanding may not be afraid from
the idea Nf7+ Kg8 Nh6+ Kh8 Qg8+ Rxg8 Nf7# so they may miss it in blitz but not
at long time control when they think about it.

strong players are not going to fall for that trick even in blitz because of the
fact that they have better pattern recognition or better positional

If Rybka knows about a lot of patterns and detect it by evaluation then of
course it has better evaluation that help it to be better in tactics.


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