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Subject: Penalty for Display of Alternate Moves = ?

Author: Bob Durrett

Date: 15:01:00 12/02/02



Fritz will display second best, third best, etc. moves and give a line for each.
 But the Fritz manual says doing so requires extra computation when compared to
calculating only one move and displaying a line for it.

I do not know what other chess-playing programs have to offer insofar as display
of alternate moves with there lines is concerned.

A few questions:

(1) If other programs offer this same feature, how do these chess engines
produce the alternate moves and lines? Differently from the way the first move
and it's line is produced?

(2) If a chess-playing program were optimized to display multiple lines, would
the search algorithms and position evaluation code be any different from those
of a chess engine optimized for one move [and it's line] only?

(3) If an engine is not optimized for this application, how much will the engine
performance be handicapped if it is forced to display alternate moves and their
lines?

There may not be any simple answers to these questions?  : (

My motive for asking these questions is obtain preliminary information which I
might use for an idea, having to do with trees of "best move sequences," I would
like to think more about.

Bob D.






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