#include<bits/stdc++.h>
using namespace std;
int main(){
    int t;
    cin>>t;
    while(t--){
        int n,m;
        cin>>n>>m;
        if(m==1){
            cout<<"YES"<<endl;
            cout<<1<<endl;
            continue;
        }
        else if(m%2==0){
            cout<<"YES"<<endl;
            for(int i=1;i<=n;i++,cout<<endl)
                for(int j=1;j<=m;j++)
                    cout<<(i-1)*m+j<<' ';
        }else {
            cout<<"YES"<<endl;
            vector<vector<int>> g(n+1,vector<int>(m+1));
            for(int i=1;i<=n;i++)
                for(int j=1;j<=m;j++)
                    if((i%2)==0)
                        g[i][j]=(i-1)*m+j;
                    else g[i][j]=(i-1)*m+j+1;
            for(int i=1;i<=n;i+=2)
                g[i][m]=(i-1)*m+1;
            for(int i=1;i<=n;i++,cout<<endl)
                for(int j=1;j<=m;j++)
                    cout<<g[i][j]<<' ';
        }
        
    }
}