[Fluffy]

2/1 (or SAYC)

1♣-1♥ Nat
2♦-2♠ 4SF
3♣-4♣ Nat
4♦-4♥ Cues
4♠-4NT RCKW
5♣-5♦ 4 Kcs, asks about ♣Q
5NT-6♣ ♣Q, but no outside king
pass

[Edmunte1]

Ambra:

1♣ ----- 1♥
2♦(1)---2♠(2)
2NT(3) --- 3♣(2)
3♦(4) --- 3♥(5)
3♠(6) --- 4♣(7)
4♦(8) --- 4♥(9)
4♠(10) --- 5♣(11)
6♣(12)

(1) 5+♣+4♦ 17+ or 6+♣ 17+ or 5♣+4♥+SPL 17+ or 4♥ 18-19 bal
(2) relay GF
(3) 5+♣+4♦ 17+
(4) 6♣+4♦
(5) relay showing either ♣ fit or semisolid ♥
(6) 17-19 SPL ♠
(7) RKCB in ♣
(8) 14 KC
(9) cue, we have enough KC
(10) cue, ♠A
(11) denies ♣Q, we're playing only 5 if you don't have it
(12) i have it

[skjaeran]

1♣ - 1♦
2♦ - 3♣
3♦ - 3♥
4♠ - 4NT
5♣ - 5♦
6♣

1♣=2+, natural or balanced 11-14/18-19
1♦=transfer
2♦=reverse in ♦ or ♠, showing <3♥
3♣=natural GF
3♦/♥=cuebids
4♠=splinter
Then RKCB 1430

We might decide to relay after 2♦, but that would most probably make it harder to reach 6♣

[pclayton]

This is a good slam. I think a natural 2/1 auctions starts like this:

1♣ - 1♥
2♦ - 2♥

Like Josh, I think 2♥ is far better than 3♣, since it saves space, forces, and it is descriptive. However, I believe the auction should continue:

3N.

This hand has 8 tricks, and 3♣ isn't forcing. If 3♣ was forcing, I'm fine with it, but 2♥ can be made on a variety of weak hands and Responder needs to get out. Obviously Opener has a good hand, so....

...........4♣
4♦ - 4♥
4♠ - 5♣

6♣ isn't certain, but it should have a good play.

[MarceldB]

in REGRESsion the bidding will be:

• Pass = 13+ any shape
1♣ = 6-11 part of bal. shapes OR 12+any shape
• 1♦ = 13+ balanced, OR 17+ s/void
2♣= 6-11 bal.♥ :5332 with 2or 3 toph. in 5card, OR 6322 and toph.=?
• 2♦= positive relay
2♠= 10-11 if 6322 then no 2 or 3 toph. in 6 card
•2NT= relay
3♣ = 5332, and 1 side suit with a stopper
•3♦ = relay
3♥= 2=5=3=3
•3♠= Slam asking Bid ♥= trump (can alter afterwards)
4♣= AK♥
•4♠= Suit asking Bid ♦
5♣= Q (if no K or Q♦ = 4NT bid you pass in comfort, KQ♦ is not possible)

because of 1 side-suit stopper this must be QJx (♠stop impossible with Q♦)
•6♣= impossible bid, thus to play

---
slightly better because the exact distribution is not a big issue here
is to bid after 3♣

•3♥= Control Point asking
3NT= 3CP (A=2, K=1)
•4♣= scan
4♦= AK ♥ (non not possible because of 2 toph.)
•4♥= scan further (normally: but first Q of your longest suit, which can not be possible AKQ + side stopper = 12HCP)
4♠= no Q♠ (if Q♠ no J♥= 4NT bid, or 5♣ with J♥ you pass in comfort)
•6♣ thus QJx♦

[dellache]

Hope it's not 2 late to answer
We'd bid it (spider system) :
1♣ Nat or 15-19 BAL
1♦ 4+H, 4+HCP
2♦ ART strong, many hands usually 6+C
2♠ GFR
3♦ 6+C4+D, 3-4 losers.
3♥ Shortness ?
3♠ Short spades
4♣ Set clubs
4♦ No extras
4♥ Keycards
4NT 4 of them
6♣ Pard has A xx Axxx AKQxxx or A xx AKxx AKxxxx

[lowerline]

1♣(1) - 1♥(2)
1♠(3) - 2♦(4)
2♥(3) - 2♠(5)
2NT(3) - 3♦(6)
3♥(3) - 3NT(7)
4♣(3) - 4♠(8)
4NT(3) - 5♣(9)
?

(1) 16+ relay
(2) GF 4+♥
(3) relay
(4) 1suiter
(5) short ♠
(6) 2-5-3-3
(7) 3 controls
(8) ♥A or ♥K, tophonor ♦, no tophonor ♣
(9) no tophonor ♠
Time to think. South has ♥A and a red king. Relaying again is not without risk. A 5♥/♠ response will get you to a bad 6♣. Only a 5NT response will make a good 6♣, but now 6♣ is a relay! (otoh 7♣ has a chance...). If a swing is needed, relay again. If not, pass 5♣.

Steven