[P_Marlowe]

Hi,

a reasonable auction after 3S is

RKCB, followed by Checking for Kings, confirming all key Cards,
and after the strong hand signs of in 6S,
raising to 7S holding KQJx in diamonds.
Those 2 undisclosed tricks need to be worth someting, not sure it
is sensible todo without the Jack, but the Jack IS a full trick.

I am not saying I would find this on the table, but I am quite often
asleep.

With kind regards
Marlowe

[Douglas43]

 AL78, on 2022-February-18, 17:17, said:

Expecting a constructive slam investigation, I was surprised by the unilateral decision by partner that 6♠ was the place to play knowing little about my hand other than it isn't rubbish. I had a think about what partner could have to place the contract like this, and thought about bidding the grand, but eventually decided that if 6♠ was there, 6NT should be there as well, so bid it. This was the complete board:

https://tinyurl.com/y9o4s47a

I won the opening lead and claimed the rest. I couldn't help thinking it would have been better to probe in the auction and maybe find out the grand is good, but 6NT got us a decent score with all but one other in spades. Strangely, the two who found 7♠ went off although if South plays it I can't see how.

I would have expected 6♠ to include a void, with no exclusion available.

[pescetom]

 Cyberyeti, on 2022-February-19, 04:15, said:

I think playing with my partner the auction would go:

2♣-2N (really good 9 or better bal, 22 is our minimum balanced for 2♣ and our structure requires 4N to be invitational opposite this, F4N unless suit known open)
3♠(this shows 6 as we play 3♣ as art or clubs which we use with 5)-4♦(cue)
4♥(cue)-4♠
5♣-5♥
5N(still interested in grand, all keycards held but no sensible way of asking)-7N (6+4+2+1 = 13)

Not that different from our playing with partner:

2♣-2♦(at least 1 control)
3♠(6+, imposes trumps)-4♦(cue)
4♥(cue for ♣)-4N(even keycards (must be zero, so slam interest))
5♦(cue)-5♥(cue)
6♣(cue + ♠Q)-6♦(cue)
6N(to play 6+2+3+1)-7N(6+2+4+1 pal).

6N by S is a slight act of faith because N might just have a diamonds void (although even then 7N probably only needs ♣K onside). But N has the information to bid 7N even over 6♠.

[Gilithin]

This one depends on agreements and there are quite a lot of options. A popular method over 2♦ GF is for 2NT to be a positive with hearts. Another is to play 2NT and 3m as transfers. Either way, 2♥ is obvious. But if you play 2NT to show this hand then obviously that is what you bid!
After 2♠, we again have options. The most common way of playing here is for 2NT to be any very weak hand and for 3♠/4♠ to show some values. Traditionally a direct 4♠ denies any ace but in this RKCB era it makes more sense for it to be zero key cards. If you play this way then you have a clear 4♠. The main alternative is for 2NT to deny a fit and for 4♠ to be fast arrival; in that case your rebid is 3♠.