// checks all possibilities of multiple beatings
private void multipleBeatings(bool isFirstPlayer, List <Move> possibleMovements, Move move, int startX, int startY)
{
int x = move.getNewX();
int y = move.getNewY();
int beatenX = move.getBeatingX();
int beatenY = move.getBeatingY();
Pawn beatenPawn = board[beatenX, beatenY];
board[move.getBeatingX(), move.getBeatingY()] = null;
if (!board[startX, startY].checkIfKing())
{
if (isFirstPlayer)
{
if (isInBoard(x - 2, y - 2) && board[x - 2, y - 2] == null && board[x - 1, y - 1] != null && board[x - 1, y - 1].isFirstPlayer() != isFirstPlayer ||
isInBoard(x - 2, y + 2) && board[x - 2, y + 2] == null && board[x - 1, y + 1] != null && board[x - 1, y + 1].isFirstPlayer() != isFirstPlayer)
{
if (isInBoard(x - 2, y - 2) && board[x - 2, y - 2] == null && board[x - 1, y - 1] != null && board[x - 1, y - 1].isFirstPlayer() != isFirstPlayer)
{
Move newMovement = new Move(x, y, x - 2, y - 2, x - 1, y - 1, move);
move.setNextBeating(newMovement);
multipleBeatings(isFirstPlayer, possibleMovements, newMovement, startX, startY);
}
if (isInBoard(x - 2, y + 2) && board[x - 2, y + 2] == null && board[x - 1, y + 1] != null && board[x - 1, y + 1].isFirstPlayer() != isFirstPlayer)
{
Move newMovement = new Move(x, y, x - 2, y + 2, x - 1, y + 1, move);
move.setNextBeating(newMovement);
multipleBeatings(isFirstPlayer, possibleMovements, newMovement, startX, startY);
}
}
else
{
while (move.getPrevBeating() != null)
{
move = new Move(move.getPrevBeating());
}
possibleMovements.Add(move);
}
}
else
{
if (isInBoard(x + 2, y - 2) && board[x + 2, y - 2] == null && board[x + 1, y - 1] != null && board[x + 1, y - 1].isFirstPlayer() != isFirstPlayer ||
isInBoard(x + 2, y + 2) && board[x + 2, y + 2] == null && board[x + 1, y + 1] != null && board[x + 1, y + 1].isFirstPlayer() != isFirstPlayer)
{
if (isInBoard(x + 2, y - 2) && board[x + 2, y - 2] == null && board[x + 1, y - 1] != null && board[x + 1, y - 1].isFirstPlayer() != isFirstPlayer)
{
Move newMovement = new Move(x, y, x + 2, y - 2, x + 1, y - 1, move);
move.setNextBeating(newMovement);
multipleBeatings(isFirstPlayer, possibleMovements, newMovement, startX, startY);
}
if (isInBoard(x + 2, y + 2) && board[x + 2, y + 2] == null && board[x + 1, y + 1] != null && board[x + 1, y + 1].isFirstPlayer() != isFirstPlayer)
{
Move newMovement = new Move(x, y, x + 2, y + 2, x + 1, y + 1, move);
move.setNextBeating(newMovement);
multipleBeatings(isFirstPlayer, possibleMovements, newMovement, startX, startY);
}
}
else
{
while (move.getPrevBeating() != null)
{
move = new Move(move.getPrevBeating());
}
possibleMovements.Add(move);
}
}
}
else //kings
{
if (isInBoard(x - 2, y - 2) && board[x - 2, y - 2] == null && board[x - 1, y - 1] != null && board[x - 1, y - 1].isFirstPlayer() != isFirstPlayer ||
isInBoard(x - 2, y + 2) && board[x - 2, y + 2] == null && board[x - 1, y + 1] != null && board[x - 1, y + 1].isFirstPlayer() != isFirstPlayer ||
isInBoard(x + 2, y - 2) && board[x + 2, y - 2] == null && board[x + 1, y - 1] != null && board[x + 1, y - 1].isFirstPlayer() != isFirstPlayer ||
isInBoard(x + 2, y + 2) && board[x + 2, y + 2] == null && board[x + 1, y + 1] != null && board[x + 1, y + 1].isFirstPlayer() != isFirstPlayer)
{
if (isInBoard(x - 2, y - 2) && board[x - 2, y - 2] == null && board[x - 1, y - 1] != null && board[x - 1, y - 1].isFirstPlayer() != isFirstPlayer)
{
Move newMovement = new Move(x, y, x - 2, y - 2, x - 1, y - 1, move);
move.setNextBeating(newMovement);
multipleBeatings(isFirstPlayer, possibleMovements, newMovement, startX, startY);
}
if (isInBoard(x - 2, y + 2) && board[x - 2, y + 2] == null && board[x - 1, y + 1] != null && board[x - 1, y + 1].isFirstPlayer() != isFirstPlayer)
{
Move newMovement = new Move(x, y, x - 2, y + 2, x - 1, y + 1, move);
move.setNextBeating(newMovement);
multipleBeatings(isFirstPlayer, possibleMovements, newMovement, startX, startY);
}
if (isInBoard(x + 2, y - 2) && board[x + 2, y - 2] == null && board[x + 1, y - 1] != null && board[x + 1, y - 1].isFirstPlayer() != isFirstPlayer)
{
Move newMovement = new Move(x, y, x + 2, y - 2, x + 1, y - 1, move);
move.setNextBeating(newMovement);
multipleBeatings(isFirstPlayer, possibleMovements, newMovement, startX, startY);
}
if (isInBoard(x + 2, y + 2) && board[x + 2, y + 2] == null && board[x + 1, y + 1] != null && board[x + 1, y + 1].isFirstPlayer() != isFirstPlayer)
{
Move newMovement = new Move(x, y, x + 2, y + 2, x + 1, y + 1, move);
move.setNextBeating(newMovement);
multipleBeatings(isFirstPlayer, possibleMovements, newMovement, startX, startY);
}
}
else
{
while (move.getPrevBeating() != null)
{
move = new Move(move.getPrevBeating());
}
possibleMovements.Add(move);
}
}
board[beatenX, beatenY] = beatenPawn;
beatenPawn = null;
}