private void removeCheckersAt(int x, int y) {
        List<Checker> cList = getWorld().getObjectsAt(x, y, Checker.class);
        for(Checker c : cList) {
            if(c != null && c.team != this.team) {
                getWorld().removeObject(c);
                Greenfoot.playSound("coin-jump.wav");
            }
        }
    }