[msjennifer]

Sir,
I played as a substitute in the above mentioned event.Match Points scoring As the cards were the contract was cold.

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[helene_t]

Don't argue with success, but ...

4♦: I think I would have bid 4NT to make partner chose a minor. I appreciate that 4♦ is a good lead director, but partner could have a 3613 17-count or such. But OK, that's maybe a bit contrived, and even then, 4nt could get us overboard if partner chooses 5♥. So I suppose 4♦ is ok. It strikes me as an underbid, but maybe you expect to get a second turn. There's also the upside that 4nt could maybe be misunderstood. You were subbing so presumably you didn't have many partnership agreements.

West's pass after 4♠: I don't understand. How can you have the agreement to play forcing pass here, in a substitute partnership? I don't think that's standard.

6♣: This isn't quite consistent with 4♦ (unless that was understood as forcing but that seems unlikely). You could easily be off two aces so I would just bid 5♣.

6NT: Presumably that was meant as pick a minor, but if that's what you wanted to do, I would have bid 6♠ which is less likely to be misunderstood. I wouldn't do it. The 7-level belongs to the opponents. I would most certainly have left in partner's double, unless maybe if you take that double as a forward double. Even then ....

West's final pass looks reasonable. We are probably off an ace, and 7♦ could suffer a club ruff.

[msjennifer]

SIRS/Ms/Mrs.,
My personal comments are,
West was too timid to pass a Game forcing 4D bid when she passed the 4S bid by her RHO.
East was a bit excited when she bid 6C.
The 6H bid by S was ,I personally feel
,the silliest bid.

[helene_t]

msjennifer, on 2020-June-01, 18:48, said:

West was too timid to pass a Game forcing 4D bid when she passed the 4S bid by her RHO.

But if 4♦ was GF, then West's pass is forcing, and then it is a common agreement that pass is stronger than 5♦.

[pescetom]

I may be excessively natural but my only sympathy for the 1♠ opening is that BBO insists on writing 10 instead of T which can falsify the perception of suit length.
Otherwise I agree with msjennifer that the only real crime is the 6♥ bid by S.

[Cyberyeti]

pescetom, on 2020-June-02, 13:51, said:

I may be excessively natural but my only sympathy for the 1♠ opening is that BBO insists on writing 10 instead of T which can falsify the perception of suit length.
Otherwise I agree with msjennifer that the only real crime is the 6♥ bid by S.

If partner was going to be on lead v 7♣ I would agree with 6♥, but you are.

[AL78]

I would have raised to 4♠ as North with six card support. 6♣ looks like a wild punt which just happens to work because West has a stonking hand for the double.