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Subject: null move

Author: Viktor Popjuk

Date: 03:04:52 02/10/99


please, I need some help.

I'm writing  my first chess program and i try implement null-move, but I'm not
fully understand it.

I write something like this:

alphabeta(a,b,d)
{
    if not in check and last_move not null_move
    then
        make null_move
        val = -alphabeta(-b,-a,d-1)
        unmake_move

       ??? what done here with val?
       ??? return if val >alpha+xxx?
       ??? and what return ?

   endif

   ...
   normal alphabeta

}

Thanks for any help.

Viktor.


Sorry for my bad english.



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