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Subject: Re: How much ply should FINE #60 be solved?

Author: Dieter Buerssner

Date: 11:38:25 07/02/03

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On July 02, 2003 at 14:27:11, Michel Langeveld wrote:

>>Also, this position is Fine 70 (not 60), IIRC. :)
>
>Why is there less ply needed to solve it with using hashtables?

This position is about tempo tricks. In a normal alpha-beta search using engine,
even with optimal move ordering, you have to do all moves, and refute them. Many
such moves will yield in shortcuts to the mainline. The HTs will remember the
positions after the shortcuts, and with this info, the engine can see the
mainline earlier.

>p.s. Yes I saw after this post it's Fine #60 ... also I mean one pawn upwards
>instead +2

Seems the "7"-key is not working well on your keyboard :-)

Anyway, when your engine solves this fast, but needs still 26 plies with HTs, I
think it is no reason to be concerned.

Regards,
Dieter



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