Wow, nice result
What was the high-card distribution of your hand? And the loser count?
The reason I'm asking is because a lot of people misbid shapely hands with weakish suits.
ie.
Holding:
KQJTxx
-
xx
AKxxx
Sure, it's only 13 HCP, but you only have 3 losers, and you want to be in game with this hand, so a 3-heart cuebid was a creative way to get your pd's attention. Others would have simply bid 4C, to both force game and describe the shape of the hand. Note that since you want to be in game for sure, 3C is NOT a good alternative. Also, note that this hand is NOT a strong 2C opener. You'd get in a lot of trouble more often than not by opening this 2C.
On the other hand, if you held something like:
AQTxxx
-
Kx
KJTxx
Again, 13 HCP, but this time your spades are not self-sufficient, so you don't want to force game with this hand. A simple 3C would have been a better option.
Now to move on to your question about cue-bids.
Cue-bidding is a HUGE topic that obviously can't be covered in a simple post.
There are two major uses of cue-bidding in the sense that you're asking:
1. To show strength
2. To show a particular control
Sticking to 1. for the time being...
When to cue-bid?
- when you want to tell your pd you have a strong hand and you want him to keep bidding either for at least one more round or until game is reached (usually the latter)
ex 1. Cue-bidding as responder
You hold:
KJxx
x
AJxx
Qxxx
Your pd opens 1S, and the next player overcalls 2H.
1S-2H-?
In this situation, you know you want to end up in game at least, and maybe slam. Bidding 4S directly says: "I want to be in game, and that's it. I have no slam interest". Bidding 3S could mean a couple of things depending on your system, but usually it's interpreted as either a limit raise (11-12 points and spade support) inviting game, or a weak bid trying to steal the auction, with no game interest. Of course, 2S would be out of the question. The alternatives are: bid a new suit, or double. Here, what you really want to tell your pd is: I want to be in at least game, and I'm interested in slam, and I have spade support. Bidding a new suit doesn't get that job done, but cue-bidding opponents' suit does. So bid 3H, and your pd will get the message.
ex. 2 Cue-bidding in a search for 3NT
Sometimes, you know you want to be in game, but your fit is in a minor suit, so you'd like to aim for the 9-trick 3NT game instead of the 11-trick minor-suit game.
You hold:
Kxx
xxx
AKxx
KJx
The bidding goes:
1D-1H-?
Here, you have no suit to bid, you can't bid NT, and you don't want to raise diamonds just yet. The solution? Cue-bid 2H, showing a game-going hand and asking your pd if he has a heart stopper. If he does, he can bid NT. If not, he'll bid another suit or rebid diamonds, and you can next raise the diamonds, likely ending up in 5 or 6 diamonds.
Note the difference between the minor-suit and major-suit auctions!
ex. 3 - Cue-bidding as opener to show a huge hand
In this situation, responder has passed throughout the auction, but opener is still interested in keeping things alive. Typically, opener wasn't strong enough to open 2C (or whatever strong bids you use). He'll usually hold a 2-suited hand, and doesn't feel simply bidding the 2nd suit says enough.
In general, it's unwise to open 2C with a 2-suiter, by the way, because there's too little room to find your best fit.
The example for this one would be the auction you gave in your question and my comments at the beginning of this post.
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General guidelines for cue-bidding to show strength:
1. You are forcing your pd to bid, so you must be strong enough to be forcing to that particular level.
For example, in your auction, you were essentially forcing your pd to the game level, so your hand should have been strong enough to make game all by itself, assuming a doubleton of trump support.
As responder, your pd has already opened, so you needn't have as much strength. Limit-raise strength or better is necessary to be cue-bidding.
2. Don't cue-bid if you have a better alternative!
If you know what you want the final contract to be, bid it. If you want more information from your pd, cue-bid.
3. Regarding shape, if you are responder and your pd has opened a major suit and opponents overcall, your cue-bid shows EITHER: a game-going hand with good trump support, OR an AMAZING hand without trump support necessarily, but no other good bid.
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Other topics we could discuss:
1. Cue-bids in control-showing auctions
2. Michaels' cue-bid (shape showing bid)
3. Doubling and then cue-bidding
Let me know
TBG