[jdeegan]

Uh... 4NT as an invite opposite a long diamond suit and not much else??? What do I accept with??? Quantitative 4NT works with two balanced hands facing one another where point count bidding works rather well. A combined 31 HCP - not so good for six - 33HCP usually OK.
With a six or seven-bagger as the principle source of tricks - controls and fitting cards in the long suit(s) are what you need. You might say a direct 4NT is an idle bid since a forcing suit bid followed by 4NT is always available. Meckwell may have assigned a special meaning to this auction, but for most of us, the aforementioned 99%, it is RKC for diamonds. Plus, there is real merit in keeping the opponents in the dark with a short auction.

[bluecalm]

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You might say a direct 4NT is an idle bid

Assuming we play "classical" 3♦ which is about 14+-17hcp what do you plan to bid with:

AQTx AJTx x KQJx ?

Or at MP's with :

AJxx AQxx xx AJ9x ?

How do you plan to stop in NT contract if slam is no good ?
Why would you intentionally cripple yourself by not having natural 4NT available choosing RKC instead which gain nothing as you can use RKC anyway (by setting diamonds and then bidding 4NT)

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What do I accept with???

With solid/semisolid diamond suit which will be source of tricks opposite likely shortness/xx ?

[gszeszycki]

the 2 examples shown by blue calm are perfect for delaying the 4n bid
until after cue bidding first round. In both cases after 3d bid 3s if p bids 3n then bid 4n quatitative if p bids 4d showing minimum bid 4n as sign off

[cloa513]

What about something like

---

? Do you keep bidding hearts and risk partner fighting you for the trump suit -4♥ might be OK but could you miss slam with that bid?

[gszeszycki]

A xx KQJ AQJxxxx
Kxx AKQxxxx void Kxx

1c 1h 3c
3d remember p thinks we are looking for nt first
3n spades stopped a 3s bid would have been asking for partial stop)
4c obvious slam interest
4d control
4s control
5c no heart control sign off try AND worries about heart stops for nt
this bid allows you to convert clubs to hearts at whatever level u
decide to play p has 2/3 small hearts.
5h delayed heart control grand slam try we are forced to 6c
5n two of top 3 club honors
7h just remember an opening lead ruff might be more dangerous in hearts than in clubs