Using New Minor Forcing

After the auction starts 1♣ – 1♠ – 1NT, opener's rebid shows a balanced hand (usually 12–14 HCP) and denies four spades, but frequently includes three spades. If responder has a five-card suit and invitational values or better (usually 11+ points), they need a way to check for a 5-3 fit without bypassing 3NT. New Minor Forcing (NMF) uses a bid of the unbid minor as an artificial relay to ask this exact question.

Why New Minor Forcing works

If you simply rebid 2♠ over 1NT, it is a weak sign-off. Bidding 3♠ is game-forcing but eats up bidding space. NMF keeps the auction low. By bidding the unbid minor, you artificially force partner to describe their major-suit holdings further.

A worked example: Finding the 5-3 fit

The Auction:

• Opener: 1♣
• You: 1♠
• Opener: 1NT
• You: 2♦ (New Minor Forcing)

Your hand (responder):
♠ K Q 10 7 4
♥ A 5
♦ Q J 2
♣ 9 7 3
12 HCP, five spades.

Your 2♦ bid is artificial, promising at least invitational values and usually a five-card major. Opener will bid 2♠ to show three spades, bid 2♥ to show four unbid hearts, or bid 2NT/3♣ without a major-suit fit.

Four common mistakes

• Passing NMF (it is forcing for at least one round!).
• Using NMF with a weak hand (it generally requires 11+ points; with less, just pass or sign off).
• Opener bidding the NMF suit naturally instead of answering the relay.
• Forgetting your agreed methods if the opponents intervene (NMF is usually off in competition).

When the rule does not apply

If both minors have been bid, partnerships typically use Fourth Suit Forcing instead. Some partnerships play advanced variations like Two-Way New Minor Forcing, where 2♣ is always invitational and 2♦ is game-forcing. Ensure you agree with your partner on exactly which minor triggers the convention.

Key takeaways

• Used by responder after opener's 1NT rebid.
• Bid the unbid minor as an artificial ask.
• Asks opener to show three-card support for your major or four cards in the unbid major.
• Requires invitational or better values.