#include <bits/stdc++.h>

using namespace std;
#define ll long long
#define pii pair<int, int>
#define ld long double
#define all(a) (a).begin(), (a).end()

signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int t;
    cin >> t;
    while (t--) {

    int n, k;
    cin >> n >> k;
    if (k > n / 2) {
        cout << "NO\n";
        continue;
    }
    cout << "YES\n";

    vector<vector<int>> tab(n, vector<int>(n, -2));

    int n1 = n - (n % 2);

    for (int i = 0; i < n1; i += 2) {
        tab[i][i + 1] = i / 2;
        for (int j = 0; j < i; j += 2) {
            tab[j + 1][i] = i / 2;
            tab[j][i + 1] = i / 2;
        }
        for (int j = i + 2; j < n1; j += 2) {
            tab[i][j] = i / 2;
            tab[i + 1][j + 1] = i / 2;
        }
    }

    if (n1 != n) {
        for (int i = 0; i < n1; ++i) {
            tab[i][n - 1] = i / 2;
        }
    }

    for (int i = 1; i < n; ++i) {
        for (int j = 0; j < i; ++j) {
            // cout << min(tab[j][i], k - 1) + 1 << ' ';
            cout << tab[j][i] + 1 << ' ';
        }
        cout << '\n';
    } 

    }

    return 0;
}