Author: Christophe Drieu
Date: 01:19:13 07/04/02
Go up one level in this thread
On July 03, 2002 at 17:39:25, Art Basham wrote:
>Here is a good link to help anyone new here...
>
>http://www.seanet.com/~brucemo/topics/nullmove.htm
>
>I am still working on it...:-)
Great, but what MakeNullMove() function do ?
#define R 2
int AlphaBeta(int depth, int alpha, int beta)
{
if (depth == 0)
return Evaluate();
MakeNullMove();
val = -AlphaBeta(depth - 1 - R, -beta, -beta + 1);
UnmakeNullMove();
if (val >= beta)
return beta;
GenerateLegalMoves();
while (MovesLeft()) {
MakeNextMove();
val = -AlphaBeta(depth - 1, -beta, -alpha);
UnmakeMove();
if (val >= beta) // Delete these to get straight
return beta; // min-max instead of alpha-beta.
if (val > alpha)
alpha = val;
}
return alpha;
}
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