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Subject: Re: A question about the option Favour sacrifices In Junior5

Author: Amir Ban

Date: 15:05:47 11/06/98

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On November 06, 1998 at 11:12:35, blass uri wrote:

>I tried the position of the game marshall-burn
>
>rn1qr1k1/pbp2pb1/1p4p1/3p4/3P4/2NBPN2/PPQ2PP1/R3K2R w KQ - 0 1
>
>Junior5 with favour sacrifices needed 26 seconds to find the right move when
>Junior5 without favour sacrifices needs only 14 seconds to find the right move.
>
>What is the value of the option favour sacrifices?
>Does it change the evaluation of the position or only changes the search and
>searches more sacrifices?
>
>Is it productive in most of the cases for finding a good sacrifice?
>
>Uri

This option affects the search only. This option disables heuristics that tend
to get rid of apparently bad moves like sacrifices, and the result is that
Junior will usually see the point of a sacrifice one depth or more earlier.
There's a tradeoff involved, because the entire search is slowed down, but
usually it will mean sacrifices and other sharp lines will be seen earlier.

This option scores siginificantly better on large tactical suites than the
regular mode. It also plays an interesting game, though definitely weaker than
standard mode. I heard that Lonnie uses it on ICC sometimes with success.

Amir



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