Responding to a 1NT Opening
When partner opens 1NT the strength is pinned down to a two-point range — so responder becomes the captain. Here is how to add the two hands, choose the strain, and set the level.
Why Responding to 1NT Is Different
After most opening bids the strength is a wide range, so describing your hand takes several rounds. A 1NT opening is different: it promises a balanced hand with exactly 15–17 high-card points. Because partner’s strength is already known to within a point or two, you — the responder — can do the arithmetic and steer straight to the right contract.
That makes responder the captain of the auction. Your only two questions are: what strain (a major-suit fit, a minor, or no-trump) and what level (partscore, game or slam). Everything below answers those two questions.
The Point Ladder
Your side needs about 25–26 combined points for game. Since partner has shown 15–17, simple subtraction tells you where you stand.
Responder’s Action by Strength
Those numbers are for balanced hands. With a long suit or a known major fit, count a little extra for shape and lean toward bidding game.
Stayman — Looking for a 4-4 Major Fit
A response of 2♣ is Stayman: it is artificial and asks "partner, do you hold a four-card major?" Opener answers 2♦ (no major), 2♥ (four hearts) or 2♠ (four spades). Use it whenever you hold at least one four-card major and enough strength to invite.
Jacoby Transfers — Showing a Five-Card Major
With a five-card major you don’t ask — you tell. A Jacoby transfer names the suit just below your real suit, forcing opener to bid the major so the strong hand becomes declarer.
Transfer Responses to 1NT
After the transfer you can pass with a weak hand, raise to invite, or jump to game — all while partner’s strong hand stays hidden as declarer.
A Worked Example
Partner opens 1NT and you hold the hand below.
You have 10 high-card points and a five-card spade suit — enough for game. Start with a 2♥ transfer to spades; partner dutifully bids 2♠, and you raise to 4♠. The transfer both locates the eight-card fit and makes partner’s strong 1NT hand declarer, protecting it from the opening lead.
Signoffs, Minors and Slam Tries
Not every response is a step toward game. A direct 2♦, 2♥ or 2♠ that isn’t a transfer (depending on your agreements) and the weak takeout into a long suit are signoffs — "partner, just pass." With a flat 8–9 you simply raise to 2NT to invite, and with 10–15 balanced you bid 3NT directly. With 16 or more, you have slam interest — explore with quantitative 4NT or by showing a suit and then using Blackwood.
When to Invite vs Bid Game
✓ Bid game directly when
- You hold 10+ points opposite a 15–17 opener
- You have a known eight-card major fit
- A long suit adds extra playing tricks
✗ Only invite when
- You have exactly 8–9 points
- Your shape is flat with no source of extra tricks
- You want partner to judge with a maximum
Common Mistakes Responding to 1NT
- Using Stayman with no four-card major. Stayman asks about majors — without one you have no good answer to any reply.
- Passing with a long suit and a weak hand. A weak takeout into your six-card suit usually plays better than a flat 1NT.
- Bidding 3NT with a five-card major. Transfer first; you may have a far better major-suit game.
- Inviting with 10+ points. That is enough for game — bid it rather than risk partner passing the invitation.
Key Takeaways
- Partner’s 1NT shows 15–17 balanced, so you can count the partnership total precisely.
- Pass with 0–7, invite with 8–9, bid game with 10+.
- 2♣ Stayman finds a 4-4 major fit; a transfer shows a five-card major.
- Transfers make the strong hand declarer and protect it from the lead.
- With 16+ points, switch from game to slam exploration.
Related Guides
Frequently Asked Questions
You can pass with 0–7 balanced points. Invite game with 8–9, bid game with 10–15, and explore slam with 16 or more, since partner has shown 15–17.
Use 2♣ Stayman when you hold at least one four-card major and enough strength to invite or bid game. It asks opener to show a four-card major.
Stayman asks about four-card majors and is used when you have one or both. A Jacoby transfer tells partner you hold a five-card major and forces them to bid it.
Often no. With a long suit and few points, a weak takeout into that suit usually plays better than leaving partner in 1NT with a misfit.
Yes. With about 16+ points the partnership may hold 31 or more, enough for a small slam. Use a quantitative 4NT raise or show a suit and then use Blackwood.
Bid game. Ten points opposite a 15–17 opener gives your side around 25–27, comfortably in the game zone, so do not risk an invitation that partner might pass.