public IEnumerable <IGameMove> GetPossibleMoves()
{
// printHistory();
if (promotion)
{
return(GetPromotionMoves());
}
List <BoardPosition> positions = GetPlayerPieces(CurrentPlayer);
List <ChessMove> possible = new List <ChessMove>();
foreach (BoardPosition position in positions)
{
ChessPiecePosition cpos = GetPieceAtPosition(position);
if (cpos.PieceType == ChessPieceType.Pawn)
{
List <ChessMove> temp = PawnPossible(position); //convertMoveList(position, PawnPossible(position));
possible.AddRange(temp);
}
else if (cpos.PieceType == ChessPieceType.Knight)
{
possible.AddRange(KnightPossible(position)); //convertMoveList(position, KnightPossible(position)));
}
else if (cpos.PieceType == ChessPieceType.Bishop)
{
possible.AddRange(BishopPossible(position)); //convertMoveList(position, BishopPossible(position)));
}
else if (cpos.PieceType == ChessPieceType.RookKing ||
cpos.PieceType == ChessPieceType.RookPawn ||
cpos.PieceType == ChessPieceType.RookQueen)
{
possible.AddRange(RookPossible(position)); //convertMoveList(position, RookPossible(position)));
}
else if (cpos.PieceType == ChessPieceType.Queen)
{
possible.AddRange(QueenPossible(position)); //convertMoveList(position, QueenPossible(position)));
}
else
{
possible.AddRange(KingPossible(position)); //convertMoveList(position, KingPossible(position)));
}
}
//Console.WriteLine($"board preval is {Value}");
possible = EndangerKing(possible, findKing(CurrentPlayer));
//Console.WriteLine($"Board postvalue {Value}");
return(possible);
}
/// <summary>
/// Gets a sequence of all positions on the board that are threatened by the given player. A king
/// may not move to a square threatened by the opponent.
/// </summary>
public IEnumerable <BoardPosition> GetThreatenedPositions(int byPlayer)
{
// TODO: implement this method. Make sure to account for "special" moves.
List <BoardPosition> positions = GetPlayerPieces(byPlayer);
List <ChessMove> threatened = new List <ChessMove>();
foreach (BoardPosition position in positions)
{
ChessPiecePosition cpos = GetPieceAtPosition(position);
if (cpos.PieceType == ChessPieceType.Pawn)
{
threatened.AddRange(PawnThreat(position));
}
else if (cpos.PieceType == ChessPieceType.Knight)
{
threatened.AddRange(KnightThreat(position));
}
else if (cpos.PieceType == ChessPieceType.Bishop)
{
threatened.AddRange(BishopThreat(position));
}
else if (cpos.PieceType == ChessPieceType.RookKing ||
cpos.PieceType == ChessPieceType.RookPawn ||
cpos.PieceType == ChessPieceType.RookQueen)
{
threatened.AddRange(RookThreat(position));
}
else if (cpos.PieceType == ChessPieceType.Queen)
{
threatened.AddRange(QueenThreat(position));
}
else
{
threatened.AddRange(KingThreat(position));
}
}
return(convertMoveList(threatened, byPlayer));
}
/// <summary>
/// Manually places the given piece at the given position.
/// </summary>
// This is used in the constructor
private void SetPosition(BoardPosition position, ChessPiecePosition piece)
{
mBoard[position.Row, position.Col] = (sbyte)((int)piece.PieceType * (piece.Player == 2 ? -1 :
piece.Player));
}