public PointGame getRightNeighbor() {
		int x0 = x;
		int y0 = y;
		while (x0 < MAXX) {
			// check if x=2 and y=3, we cannot go to the right.
			if(x0==2 && y0==3)
				break;
			x0++;
			if (Board.validPoints.contains(new PointGame(x0,y0))) {
				return new PointGame(x0,y0);
			}
		}
		return null;
	}