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Subject: Re: Diep as a strong sparring opponent (longish)?

Author: Omid David Tabibi

Date: 11:53:21 10/13/03

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On October 13, 2003 at 14:19:14, Christophe Theron wrote:

>On October 13, 2003 at 13:09:03, Charles Roberson wrote:
>
>>
>>  You make the statement that Diep is a positional engine and you chose it based
>>on that. So, why did you run G/5 matches? At G/5 tactics and search depth
>>is crucial.
>
>
>
>I would like to bring to your attention that tactics and search depth are
>crucial at any time controls in chess.
>
>Showing dimishing returns from increased search depth is so difficult that in
>practice there is little difference between blitz and long time controls.
>
>If engine A gets a beating at blitz, expect it to get the same beating if you
>repeat the match with long time controls.

Generally that's true, but not always. Falcon using checks in quiescence and a
large set of extensions turns into a tactical monster, but the worsened
branching factor makes the tactical strength less significant in longer time
controls.

The version with all the extensions and checks in quiescence decisively
outplayed Tiger in blitz time control (5 minute per game on my PIII/733MHz),
while it got demolished in 1 hour per game time control...


>
>
>
>    Christophe



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