/*
* Check all squares in the rooks row, then all squares in it's column
*/
private static bool ValidRook(MoveLogic ml, Square fromSquare, ChessColor color, bool FirstValid, int row, int col)
{
// check horizontally
for (int i = 0; i < 8; i++)
{
if (ml.MovePiece(fromSquare, ml.gb.squares[i, col], true))
{
if (IsValidMove(ml, color, FirstValid, i, col))
{
if (FirstValid)
{
return(true);
}
}
}
}
// check vertically
for (int i = 0; i < 8; i++)
{
if (ml.MovePiece(fromSquare, ml.gb.squares[row, i], true))
{
if (IsValidMove(ml, color, FirstValid, row, i))
{
if (FirstValid)
{
return(true);
}
}
}
}
return(false);
}
/*
* Check two spaces in front and one space to the left and right of the pawn. Since a pawn can only move forward,
* the sign variable captures that.
*/
private static bool ValidPawn(MoveLogic ml, Square fromSquare, ChessColor color, bool FirstValid, int row, int col)
{
int sign = fromSquare.Piece.Color == ChessColor.White ? 1 : -1;
for (int i = 1; i <= 2; i++)
{
for (int j = -1; j <= 1; j++)
{
if (row + (i * sign) < GameBoard.XDim && row + (i * sign) >= 0 && col + j < GameBoard.YDim && col + j >= 0)
{
if (ml.MovePiece(fromSquare, ml.gb.squares[row + (i * sign), col + j], true))
{
if (IsValidMove(ml, color, FirstValid, row + (i * sign), col + j))
{
if (FirstValid)
{
return(true);
}
}
}
}
}
}
return(false);
}
/*
* Checks all squares one space around the kind, and 2 spaces to it;s left and right (for castling)
*/
private static bool ValidKing(MoveLogic ml, Square fromSquare, ChessColor color, bool FirstValid, int row, int col)
{
for (int i = -1; i <= 1; i++)
{
for (int j = -2; j <= 2; j++)
{
if (row + i < GameBoard.XDim && row + i >= 0 && col + j < GameBoard.YDim && col + j >= 0)
{
if (ml.MovePiece(fromSquare, ml.gb.squares[row + i, col + j], true))
{
if (IsValidMove(ml, color, FirstValid, row + i, col + j))
{
if (FirstValid)
{
return(true);
}
}
}
}
}
}
return(false);
}
/*
* Calculates the given equation |x2 - x1| = |y2 - y1| where x2 is the piece row, x1 is a row 0-8
* y2 is the piece column, y1 a column 0-8. This gives the diagonals of the bishop. If it is true,
* then start checking for valid moves
*/
private static bool ValidBishop(MoveLogic ml, Square fromSquare, ChessColor color, bool FirstValid, int row, int col)
{
for (int i = 0; i < 8; i++)
{
for (int j = 0; j < 8; j++)
{
if (Math.Abs(row - i) == Math.Abs(col - j))
{
if (ml.MovePiece(fromSquare, ml.gb.squares[i, j], true))
{
if (IsValidMove(ml, color, FirstValid, i, j))
{
if (FirstValid)
{
return(true);
}
}
}
}
}
}
return(false);
}
