private boolean check3(int i, int j) {
		int first = getMatrix(i, j);
		if (first == 0 || first == -1) {
			return false;
		}
		int second = getMatrix(i + 1, j + 1);
		int third = getMatrix(i + 2, j + 2);
		if (first == second && first == third) {
			return true;
		}
		return false;
	}