#include <bits/stdc++.h>
using namespace std;
const int MOD = 1000000007;
const double PI = 3.141592653528;
const long long INF = 10000000000000000;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    vector<pair<pair<int, int>, int> > v;
    long long sum = 0;
    for (int i = 0; i < 2 * n - 1; ++i) {
      int a, b;
      cin >> a >> b;
      v.push_back(make_pair(make_pair(a, b), i));
      sum += b;
    }
    cout << "YES\n";
    sort(v.rbegin(), v.rend());
    long long sum1 = v[0].first.second;
    int k = 1;
    for (int i = 0; i < n - 1; ++i) sum1 += v[k + 2 * i].first.second;
    if (2 * sum1 < sum) ++k;
    cout << v[0].second + 1 << " ";
    for (int i = 0; i < n - 1; ++i) cout << v[k + 2 * i].second + 1 << " ";
  }
}
