Opening 3NT
The Gambling 3NT by Chris Jagger. I'm not going to pretend that the gambling 3NT is a vital convention that everybody should know, but it is a part of normal Acol, and your partner will probably assume that you are playing it. Moreover, I recently discovered that half of the Tolle team don't know the continuations! The gambling 3NT opening is a popular method in US Tournament bridge. An opening 3NT promises a solid 7-card minor with no outside high cards. Personally, I don’t care for this method, but I must be prepared to bid against it, since it is quite common.
Natural
Gambling 3nt In Bridge
In the very earliest days of bridge this bid meant exactly what it said - a balanced hand of about twenty five points which has every intention of making nine tricks by brute force.
Bridge Gambling 3nt
No one plays it that way any more. (If by any chance you are the one who still does then please change to something better sooner rather than later.)
In the first place it becomes very difficult for partner to locate a superior suit contract, and because of this it can be difficult to find a slam other than those of the pure rock-crusher variety. Furthermore, the argument about getting there fast before your opponents find their fit really does not apply in this case. With twenty five points in your hand you would just love the opponents to get involved - a penalty double is all but certain to be extremely lucrative.
Bridge Gambling 3nt
Quite simply, with such a hand start with whatever strong opening bid you have available for the purpose. Typically this will be either 2♣ or 2♦ followed by a natural and forcing 2NT or 3NT.