[jillybean]

Here's a hand I bid with Mike777. Unlike my last post, we have pages of system notes.

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[mw64ahw]

Too strong for 3N so I start with X

[pescetom]

X

[jillybean]

I think the consensus will be X

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[jillybean]

I'm south here, wishing I had an extra heart to make a transfer.
I north does double, what do you do over 4H?

[pilowsky]

Using generic 2/1, what would 4♦ over 3NT mean here?

[jillybean]

I had a diamond in with my hearts? It must be 6, texas

[smerriman]

pilowsky, on 2024-December-29, 19:56, said:

Using generic 2/1, what would 4♦ over 3NT mean here?

I don't think there is really a "generic 2/1" approach here - in most cases you just pass 3NT even with a 6 card suit. 3NT overcalls could be wide ranging and not necessarily a balanced hand, so any move should really be showing some form of slam interest rather than just improving the contract. 4♣ = hearts and 4♦ = spades so partner can superaccept is one option. 4♣ = something artificial also works.

[pescetom]

smerriman, on 2024-December-29, 21:05, said:

I don't think there is really a "generic 2/1" approach here - in most cases you just pass 3NT even with a 6 card suit. 3NT overcalls could be wide ranging and not necessarily a balanced hand, so any move should really be showing some form of slam interest rather than just improving the contract. 4♣ = hearts and 4♦ = spades so partner can superaccept is one option. 4♣ = something artificial also works.

I agree that South African transfers would make sense here.
Our inefficient but low memory load agreement is that over any natural 3NT with no previous bidding, 2NT-like systems are "on" where possible. So 4♣=Gerber unassigned, 4♦/4♥=major transfer, 4♠=minors, 4NT = quantitative.