public void checkCollision() {
		int posx = schlange.get(0).getPosx();
		int posy = schlange.get(0).getPosy();
		int diff = 0;
		for (int i = 2; i < schlange.size(); i++) {
			diff += Math.abs(posx - schlange.get(i).getPosx());
			diff += Math.abs(posy - schlange.get(i).getPosy());
			if (diff < 9) {
				setStart(false);
				this.guiManager.showScoreGui(points);
				System.out.println("Punkte: " + points);
				gameover = true;
			}
			diff = 0;
		}
		diff += Math.abs(posx - fressen.getPosx());
		diff += Math.abs(posy - fressen.getPosy());
		//System.out.println(diff);
		if (diff < 11)
			eat();
	}