Weak 1NT Mishap

This is against the expert who plays "Gavin's Master Full". 3♦ is explained as 7 or 6 very good diamonds. Okay. It went 3♦-1.

On my table, I opened 1NT, and Lia bid 2♦ which made. That was explained as a natural overcall.

I find it interesting to see that 1NT make it easier to intervene on a safe level in that case. That is unless you play 2♦ conventional.

I found a bug. The double dummy analysis claims that N/S can make 7♠. As usual, bug reporting does not work.