public Square(Coordinate coordinate, Color color, Piece piece)
{
m_coordinate = coordinate;
m_color = color;
m_piece = piece;
}
public override ReadOnlyCollection<Move> GenerateMoves(int row, int column, Square[,] board)
{
List<Move> moves = new List<Move>();
Coordinate from = new Coordinate(column, row);
if (Color == Color.White)
{
// moves forward
if (row != 7 && !board[row + 1, column].HasPiece)
{
if (row == 1 && !board[row + 2, column].HasPiece)
{
// starting move of two squares
Coordinate to = new Coordinate(column, row + 2);
moves.Add(new Move(MoveType.PawnStart, from, to));
}
if (row == 6)
{
// promotions
Coordinate to = new Coordinate(column, row + 1);
moves.AddRange(GetPromotions(from, to));
}
else
{
// single square forward
Coordinate to = new Coordinate(column, row + 1);
moves.Add(new Move(MoveType.Standard, from, to));
}
}
// capture left
if (column != 0 && row != 7 && board[row + 1, column - 1].HasPiece && board[row + 1, column - 1].Piece.Color == Color.Black)
{
Coordinate to = new Coordinate(column - 1, row + 1);
if (row == 6)
{
// promotion captures
moves.AddRange(GetPromotions(from, to));
}
else
{
// regular captures
moves.Add(new Move(MoveType.Standard, from, to));
}
}
// capture right
if (column != 7 && row != 7 && board[row + 1, column + 1].HasPiece && board[row + 1, column + 1].Piece.Color == Color.Black)
{
Coordinate to = new Coordinate(column + 1, row + 1);
if (row == 6)
{
// promotion captures
moves.AddRange(GetPromotions(from, to));
}
else
{
// regular captures
moves.Add(new Move(MoveType.Standard, from, to));
}
}
}
else if (Color == Color.Black)
{
// moves forward
if (row != 0 && !board[row - 1, column].HasPiece)
{
if (row == 6 && !board[row - 2, column].HasPiece)
{
// starting move of two squares
Coordinate to = new Coordinate(column, row - 2);
moves.Add(new Move(MoveType.PawnStart, from, to));
}
if (row == 1)
{
// promotions
Coordinate to = new Coordinate(column, row - 1);
moves.AddRange(GetPromotions(from, to));
}
else
{
// single square forward
Coordinate to = new Coordinate(column, row - 1);
moves.Add(new Move(MoveType.Standard, from, to));
}
}
// capture left
if (column != 0 && row != 0 && board[row - 1, column - 1].HasPiece && board[row - 1, column - 1].Piece.Color == Color.White)
{
Coordinate to = new Coordinate(column - 1, row - 1);
if (row == 1)
{
// promotion captures
moves.AddRange(GetPromotions(from, to));
}
else
{
// regular captures
moves.Add(new Move(MoveType.Standard, from, to));
}
}
// capture right
if (column != 7 && row != 0 && board[row - 1, column + 1].HasPiece && board[row - 1, column + 1].Piece.Color == Color.White)
{
Coordinate to = new Coordinate(column + 1, row - 1);
if (row == 6)
{
// promotion captures
moves.AddRange(GetPromotions(from, to));
}
else
{
// regular captures
moves.Add(new Move(MoveType.Standard, from, to));
}
}
}
return moves.AsReadOnly();
}
public Square(Coordinate coordinate, Color color)
{
m_coordinate = coordinate;
m_color = color;
}
private IEnumerable<Move> GetPromotions(Coordinate from, Coordinate to)
{
return new List<Move>
{
new Move(new Queen(Color), from, to),
new Move(new Rook(Color), from, to),
new Move(new Bishop(Color), from, to),
new Move(new Knight(Color), from, to)
};
}