[Zelandakh]

TWO4BRIDGE, on 2012-October-19, 12:36, said:

.. 4H! = kickback for ♦ ( can't be 4-4 in the Majors )
.. 4S = ♦ fit, cue-bid ( worried about 2 quick losers in either of the other 2 suits: ♥ or ♣
.. 4NT = no ♦ fit

This scheme was my Option A, Don.

[bigbenvic]

32519, on 2012-October-19, 04:09, said:

This was the actual bidding sequence of the only pair who found the ♦ slam. None of the bids were alerted, so I am not sure what they all meant.

2♣-3♦
3♠-3NT
4NT-5♣ [maybe showing 1 keycard for ♦?]
5♥-6♦ [don't know what the 5♥ bid can be]
All pass

Can anyone give a better description as to what all these bids could have meant?

I would guess as to
GF - positive 5+ diamonds
Cue in ♠ (or natural) - min positive, to play Vs unsuitable hands (denying 4♠ if 3 was Nat)
B/wood - either 1 if KC or 0 if normal
last chance slam try, can you help in Hearts - Yes I can (would assume 5nt is the Negative)

I like the treating of KJTxxx and KTxx as a positive and if I've got it right that's the auction I'd like (where 3♠ is natural)

[Zelandakh]

How can you make a "last chance slam try" that commits to slam? It really makes no sense for 5♥ to be anything but a grand try but it is quite difficult to come up with any sort of reasonable idea as to what is meant here.

[the_clown]

2♣-2♦ (6+)
2NT-3♣ (puppet)
3♦-3♠
3NT-4♦
4NT-5♣
6♦

[bigbenvic]

Zelandakh, on 2012-October-22, 03:18, said:

How can you make a "last chance slam try" that commits to slam? It really makes no sense for 5♥ to be anything but a grand try but it is quite difficult to come up with any sort of reasonable idea as to what is meant here.

Since when is 5NT a slam?

[bluecalm]

The simplest and good agreement is that after 4D bid 4H/4S are cuebids = good hand for diamonds and 4NT is natural = bad hand for diamonds. After 4H/4S bids you may want to play RKCB or some variation of it which allows you to stop in 5m opposite 2 keycards (or just play that 5NT is to play after minor suit RKCB).