I was South.
At our table, the bidding went
RHO Me LHO My P
1♠ Pass 1N (F1) Pass
2♥ X 3♥ 5♣
All Pass
5♣ went -1.
At the other table, the bidding was a different as South overcalled 1NT
RHO Opps LHO Opps
1♠ 1N Pass 3N
All Pass
The opening lead was ♠9. And declarer easily scooped 9 tricks.
I am not sure if I should overcall 1NT, and do you agree with the 3NT bid over partner's 1NT? Of course, a H lead may have defeated the contract.
Any opinion?

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