#include <iostream>
using namespace std;

int main()
{
    int t;
    cin >> t;
    while (t--)
    {
        int n, m;
        cin >> n >> m;
        int a[200005];
        a[0] = m;
        for (int i = 1; i <= n; i++)
        {
            cin >> a[i];
        }
        a[n + 1] = 0;
        bool f = true;
        for (int i = 0; i < n; i++)
        {
            if (a[i + 1] - (m - a[i]) > a[i] || a[i] + a[i + 1] < m)
            {
                f = false;
            }
        }
        cout << (f ? "Yes" : "No") << endl;
    }
}