mikeh, on 2019-May-31, 20:00, said:

As a matter of bridge theory, it is generally not a good idea to have the limited hand, here 2N, asking for aces

Instead of

2N-3

♠; 3N-4

♣; 4

♦ = RKC(

♣)

one could always play

2N-3

♠; 3N-4

♣; 4

♦ = controls in diamonds, hearts and spades (so "showing", not "asking")

2N-3

♠; 3N-4

♣; 4

♦-?:

4

♥ = Do you have at least 4 key cards, partner?

...4

♠ = Yes, but I don't have the trump Q.

...5

♣ = No.

...other = Yes. I also have the trump Q, but I don't have ___

4

♠ = Do you have at least 3 key cards, partner?

...4N = Yes, but I don't have the trump Q

...5

♣ = No

...other = Yes. I also have the trump Q, but I don't have ___

4N = Do you have either at least 2 key cards and the trump Q or at least 3 key cards, partner?

...5

♣ = No.

...other = Yes, but I don't have ___

5

♣ = Do you have at least 2 key cards, partner?

...P = No

...other = Yes, but I don't have ___.

briannz556 writes 'North opens 2N. My question is what is the best way to get to slam 6N / 6♣. We play transfers & control bidding. I've toyed with:

2N - 3♠ - 4♣ - 4♦ - 4♥

but then feel I should just bid 5♣ and let North make the decision. But it doesn't grab me as being ideal.'

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Non-expert comments...

-- In my favorite version of Muppet, 3♠ is a ♣ transfer and then 4♦ is RKC for ♣s but, lacking that understanding, I like JohnU's Gerber 4♣.

-- There seem to be 12 top tricks, so you would like to reach

6N and 7N by North is reasonable.at least