public virtual Move FindBestMove(Board board, out int nMoveRating)
{
bool bSimpleMinMax = true;
m_timer.tic();
Move best_move = null;
Node node = new Node();
m_nMinMaxCount = 0;
m_nMinMaxDepth = m_nDepth;
if (m_bPerfectFinish && board.CountPieces(enPiece.Empty) <= 11)
{
m_nMinMaxDepth = 12;
}
int nBestMoveRating;
//Simple minimax interface
if (bSimpleMinMax)
{
node.depth = 0;
node.max = (m_piece == enPiece.White);
node.board = (Board)board.Clone();
nBestMoveRating = minimax_ab(node, Int32.MinValue, Int32.MaxValue, ref best_move);
}
else
{
//Move advanced interface that allows to analyse all moves
nBestMoveRating = (m_piece == enPiece.White) ? Int32.MinValue : Int32.MaxValue;
node.depth = 1;
node.max = !(m_piece == enPiece.White);
List <Move> vMoves = board.GetAvailableMoves(m_piece);
//Cycle over ALL moves
foreach (Move move in vMoves)
{
node.board = (Board)board.Clone();
node.board.MakeBlindMove(move);
nMoveRating = minimax_ab_advanced(node, Int32.MinValue, Int32.MaxValue);
Console.WriteLine("Move {0} {1}", move, nMoveRating);
if ((m_piece == enPiece.White) && nMoveRating > nBestMoveRating)
{
nBestMoveRating = nMoveRating;
best_move = move;
}
else if ((m_piece == enPiece.Black) && nMoveRating < nBestMoveRating)
{
nBestMoveRating = nMoveRating;
best_move = move;
}
}
}
nMoveRating = nBestMoveRating;
//Print log message before returning
double time = m_timer.toc();
string log_message = String.Format("Rating: {0} depth {1} in {2:F4} sec, total nodes: {3} ( {4:F0} nodes/sec) {5}", nBestMoveRating, m_nMinMaxDepth, time, m_nMinMaxCount, m_nMinMaxCount / time, best_move);
Console.WriteLine(log_message);
#if PERFORMANCE_LOG
using (StreamWriter sr = new StreamWriter("perf.log.txt", true))
{
sr.Write(DateTime.Now);
sr.WriteLine(log_message);
}
#endif
return(best_move);
}
