What about when the opening bid is one of a major and opener’s partner bids 1NT?
Is that different from a one of a minor opening?
Let’s consider what you (South) should do when West opens with a major and East bids 1NT.
Sooner or later you are going to hear someone bid 1NT, and their partner will say “forcing.” That will seem odd at first, but it is part of a system that is quite popular in North America. You may know of the 2/1 game force system. In this method, a 1NT bid in response to one of a major is forcing for one round. In normal methods this bid shows 6–10 points. Opener can pass if he wishes. In 2/1, a 1NT response has a wider range. It is possible that responder has as few as four or five points and as many as 11 or 12. Obviously, if responder has one of the weak hands, it is relatively safe for you to enter the auction, but if he has one of the bigger hands, bidding might be dangerous.
The question is what you should do when LHO bids a major and RHO bids a forcing 1NT.
The answer is that you should tend to ignore the dangers and should come into the bidding if your hand calls for it. The reason is that your RHO will have a hand in the range of 4–9 high-card points about 90% of the time.
Here are some examples of hands you might have after your RHO’s 1NT bid.
What do you do with the following three hands?
1. ♠ A 7 6 3 ♥ 9 3 ♦K J 7 ♣ K J 8 3
2. ♠ 7 6 3 ♥ A Q 2 ♦ A K J 8 ♣ Q J 5
3. ♠ Q J 8 7 3 ♥ 3 ♦ Q 7 ♣ A K 10 8 5
Now, on to what you should know about the following auction:
4. ♠ 6 4 ♥ A K Q J 8 6 ♦ 5 2 ♣ A 4 2