[Winstonm]

Quote

2) In some auctions a cue bid could promise the ace and deny a lower ranking ace. For example, 1♠ - pass - 3♠ (limit raise) - pass - 4♦.

Not only that but there are further inferences to be assumed. Suppose it went:

1H-3H (limit)
4D-4S

From this sequence it can be inferred that partner controls clubs, most likely a singleton on this bidding, else he wouldn't have moved past 4H.

[the hog]

Well this depends on agreements, but there is an interesting thread which is about Serious or frivolous 3NT in a 2/1 auction. Suffice to say when I played this style and we discovered a 9 card fit, 3NT was never to play. It was always a serious slam try. A cue was a non serious slam try. After a limit bid, the situation is quite different as resp is limited and therefor any cue by opener is a slam try. 1st and seconds together with RKC seemed to work well for us. Another toy we tried for a while ahich also worked ok was that after a limit bid a cue showed a reasonable opener and shortness in the cued suit, whereas 3N was again serious.