We could solve this with casework, but instead we can observe that the answer is Yes if and only if the scores are currently less than 3 points apart, so we can use absolute value.

Sample code (C++):

int main() {
    int x, y;
    cin >> x >> y;
 
    bool ans = abs(x - y) < 3;
 
    cout << (ans ? "Yes" : "No") << "\n";
 
    return 0;
}