Author: Kevin K
Date: 02:15:28 05/10/05
Go up one level in this thread
On May 10, 2005 at 04:36:30, Renze Steenhuisen wrote:
>What kind of sick yoke is this? It is the same code...
>
>The second code even contains the line "fFoundPv = TRUE;" A variable that isn't
>even declared!
>
>Well... If you really didn't see, and you asked seriously:
>
>fFoundPv is TRUE when "this is the first move"
>
>Cheers
>
>Renze
It was typo.
I mean:
int AlphaBeta(int depth, int alpha, int beta)
{
if (depth == 0)
return Evaluate();
GenerateLegalMoves();
while (MovesLeft()) {
MakeNextMove();
if (this is the first move)
val = -AlphaBeta(depth - 1, -beta, -alpha);
else {
val = -AlphaBeta(depth - 1, -alpha - 1, -alpha);
if ((val > alpha) && (val < beta)) // Check for failure.
val = -AlphaBeta(depth - 1, -beta, -alpha);
}
UnmakeMove();
if (val >= beta)
return beta;
if (val > alpha)
alpha = val;
}
return alpha;
}
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