public string ToAlgebraic(Board board, NotationModifiers notationModifier)
{
string algebraic;
if (Modifier == MoveModifiers.KingSideCastle)
{
algebraic = "O-O";
}
else if (Modifier == MoveModifiers.QueenSideCastle)
{
algebraic = "O-O-O";
}
else
{
string movedPieceName = MovedPieceName(board);
algebraic = SquareName(ToSquare);
if (CapturedPiece == Pieces.None)
{
if (!Pieces.IsPawn(MovedPiece))
{
algebraic = movedPieceName + algebraic;
}
}
else
{
algebraic = "x" + algebraic;
if (Pieces.IsPawn(MovedPiece))
{
algebraic = FileName(FromSquare) + algebraic;
}
else
{
algebraic = movedPieceName + algebraic;
}
}
if (Modifier == MoveModifiers.EnPassant)
{
// This appended notation doesn't seem to be used by many people.
//algebraic += " e.p.";
}
if (PromotionPiece != Pieces.None)
{
algebraic += "=" + Pieces.ToFEN(PromotionPiece).ToUpper();
}
}
algebraic += NotationModifierMap[notationModifier];
return(algebraic);
}
string MovedPieceName(Board board)
{
string movedPieceName = Pieces.ToFEN(MovedPiece).ToUpper();
// If we have no board, then we cannot disambiguate.
if (board == null)
{
return(movedPieceName);
}
// FIXME_lwr: Add disambiguation code.
return(movedPieceName);
}
protected virtual int QuiescenceSearch(int alpha, int beta, int currentPly, Sides currentSide)
{
_NodesEvaluated++;
_PlyInfo[currentPly].PrincipalVariationLength = currentPly;
if (currentPly >= PlyInfo.MaxPly)
{
return(beta);
}
int staticScore = _StaticEvaluator.Evaluate(_ScratchBoard, currentSide);
if (staticScore >= beta)
{
return(beta);
}
if (staticScore > alpha)
{
alpha = staticScore;
}
List <Move> moves;
GenerateQuiescenceMoves(currentPly, currentSide, out moves);
_PlyInfo[currentPly].Board.CopyFrom(_ScratchBoard);
foreach (Move move in moves)
{
if (move.IsCapture)
{
var value = _StaticEvaluator.PieceValue[Pieces.GetKind(move.CapturedPiece)];
if (move.IsPromotion)
{
value += _StaticEvaluator.PieceValue[Pieces.GetKind(move.PromotionPiece)];
}
value += _StaticEvaluator.PieceValue[Pieces.Pawn];
if (staticScore + value < alpha)
{
continue;
}
}
if (_ScratchBoard.MakeMove(move) == MakeMoveResults.UndoMove)
{
UndoMove(currentPly);
continue;
}
int score = -QuiescenceSearch(-beta, -alpha, currentPly + 1, Board.OtherSide(currentSide));
UndoMove(currentPly);
if (score >= beta)
{
return(score);
}
if (score > alpha)
{
alpha = score;
UpdatePrincipalVariation(move, currentPly);
}
}
return(alpha);
}