/// <summary>
/// Checks to see if the Pawn can move to the specified location
/// </summary>
/// <param name="square">The Square the Pawn is moving to</param>
/// <returns>True if the move is valid</returns>
public override bool CanMoveTo(Square square)
{
if (square.ColumnLabel == Space.ColumnLabel) //Normal movement
{
int distance = square.RowNumber - Space.RowNumber;
if (distance == 1)
{
return(true);
}
else if (distance == -1 && !white)
{
return(true);
}
else if (distance == 2 && white && !hasMoved)
{
return(true);
}
else if (distance == -2 && !white && !hasMoved)
{
return(true);
}
}
else if (square.Piece != null && IsDiagonalTo(square)) //Taking Pieces
{
if (IsWhite)
{
if (square.Equals(Space.TopLeftOf()))
{
return(true);
}
else if (square.Equals(Space.TopRightOf()))
{
return(true);
}
}
else
{
if (square.Equals(Space.BottomLeftOf()))
{
return(true);
}
else if (square.Equals(Space.BottomRightOf()))
{
return(true);
}
}
}
//En Passant
else if ((Space.RightOf().Piece is Pawn || Space.LeftOf().Piece is Pawn) &&
((Space.RightOf().Piece != null && Space.RightOf().Piece.IsWhite != IsWhite) || (Space.LeftOf().Piece != null && Space.LeftOf().Piece.IsWhite != IsWhite)))
{
if (Program.lastMoved.Space.Equals(Space.RightOf()) || Program.lastMoved.Space.Equals(Space.LeftOf()))
{
if (Math.Abs(Program.lastEndSpace.RowNumber - Program.lastStartSpace.RowNumber) == 2)
{
if (square.Piece == null && IsDiagonalTo(square))
{
if (IsWhite)
{
if (square.RowNumber > Space.RowNumber)
{
return(true);
}
}
else
{
if (square.RowNumber < Space.RowNumber)
{
return(true);
}
}
}
}
}
}
return(false);
}
/// <summary>
/// MoveTo for Kings, used to implement Castling
/// </summary>
/// <param name="square">The Square to move to</param>
/// <returns>True if the move was successful</returns>
public override bool MoveTo(Square square)
{
bool b = base.MoveTo(square);
if (Math.Abs(Board.colLabels.IndexOf(square.ColumnLabel) - Board.colLabels.IndexOf(Program.lastStartSpace.ColumnLabel)) == 2) //Castling
{
if (Board.colLabels.IndexOf(square.ColumnLabel) - Board.colLabels.IndexOf(Program.lastStartSpace.ColumnLabel) > 0) //Moving right
{
Program.board[Board.colLabels[Board.colLabels.IndexOf(Program.lastStartSpace.ColumnLabel) + 3] + Program.lastStartSpace.RowNumber.ToString()].Piece.MoveTo(Space.LeftOf(), true);
}
else //Moving left
{
Program.board[Board.colLabels[Board.colLabels.IndexOf(Program.lastStartSpace.ColumnLabel) - 4] + Program.lastStartSpace.RowNumber.ToString()].Piece.MoveTo(Space.RightOf(), true);
}
}
return(b);
}