private void processMoveFromBoard(MouseEvent e) {
        int row = findRow(e.getY());
        int col = findCol(e.getX());
        int index = row * 4 + col;
        if (index > -1 && index < 12) {
            activeMove = new CardMoveImpl(index, CardMoveImpl.MOVE_TYPE_FROM.FROM_BOARD);
        }
    }