private JavaList <object> FindAllLegalKingDiagonalAttackMoves(JavaList <object> lastPos, int currentPos, int playerColor, int enemyColor, int incX, int incY)
{
var x = PosToCol(currentPos);
var y = PosToBoardLine(currentPos);
var moves = new JavaList <object>();
var startPos = (int)lastPos.peek_head();
var i = x + incX;
var j = y + incY;
// Find enemy
while (i > 0 && i < 7 && j > 0 && j < 7 &&
(_pieces[ColLineToPos(i, j)] == EmptyPiece || ColLineToPos(i, j) == startPos))
{
i += incX;
j += incY;
}
if (i > 0 && i < 7 && j > 0 && j < 7 && (_pieces[ColLineToPos(i, j)] & ~King) == enemyColor &&
!lastPos.Contains(ColLineToPos(i, j)))
{
lastPos.push_back(ColLineToPos(i, j));
i += incX;
j += incY;
var saveI = i;
var saveJ = j;
JavaList <object> tempMoves;
while (i >= 0 && i <= 7 && j >= 0 && j <= 7 &&
(_pieces[ColLineToPos(i, j)] == EmptyPiece || ColLineToPos(i, j) == startPos))
{
int dir;
if (incX == 1 && incY == 1)
{
dir = LastDirectionLeftAbove;
}
else if (incX == -1 && incY == -1)
{
dir = LastDirectionRightBelow;
}
else if (incX == -1 && incY == 1)
{
dir = LastDirectionRightAbove;
}
else
{
dir = LastDirectionLeftBelow;
}
var tempPos = lastPos.Clone();
tempMoves = FindAllLegalKingAttackMoves(tempPos, ColLineToPos(i, j), dir, playerColor, enemyColor);
if (Any(tempMoves))
{
moves.AppendToTail(AddNewGameMovement(new PlayerMove(currentPos, ColLineToPos(i, j)), tempMoves));
}
i += incX;
j += incY;
}
lastPos.pop_back();
if (moves.IsEmpty())
{
i = saveI;
j = saveJ;
while (i >= 0 && i <= 7 && j >= 0 && j <= 7 &&
(_pieces[ColLineToPos(i, j)] == EmptyPiece || ColLineToPos(i, j) == startPos))
{
tempMoves = new JavaList <object>();
tempMoves.push_back(new PlayerMove(currentPos, ColLineToPos(i, j)));
moves.push_back(tempMoves);
i += incX;
j += incY;
}
}
}
return(moves);
}