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Subject: "Next best" option.

Author: Carlos Adan Bonilla

Date: 10:10:23 06/10/98


Hi!

When using a computer to analyze or to play chess, you may find that a
lot of programs have a "Next best move" option in the menu.
As a matter of fact, if you wanna know the second best move in a certain
position alpha-beta pruning is not enough because that second best move
could have been cut off.

So my first question is:
Do those programs use alpha-beta cut offs? Or do they use an special
version of that algorythm?

I mean programs which move that second best move immediately after
pushing the "Next best" move... (they don't need to search for it
again).

Second question: when the user selects "Next best" is because he doesn't
like the best move... but the new selected move may have been selected
because it's preparing to move that former best move again but in the
next move (I mean two plies after, the next move of that colour).
But this new line is likely to unsatisfy the user again because it
contains the same rejected move...
How can this things be handled?
Do the existing programs take this into account?
(I don't think so)

Thx in advance for your answers...




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