private static int Quiescence(Board board, int alpha, int beta)
{
int stand_pat = Engine.Eval.Board(board);
if (stand_pat >= beta)
return beta;
if (alpha < stand_pat)
alpha = stand_pat;
List<Move> captures = board.GenerateCaptures();
foreach (Move move in captures)
{
if (!board.AddMove(move)) continue;
int score = -Quiescence(board, -beta, -alpha);
board.SubtractMove();
if (score >= beta)
return beta;
if (score > alpha)
alpha = score;
}
return alpha;
}