How to Respond to 1NT in Bridge
When your partner opens 1NT (usually 15–17 HCP, balanced), choose your action based on your hand’s strength and shape: pass, invite, bid game, or search for a major-suit fit.
Step 1: Count Your Points
- 0–7 HCP → Weak hand
- 8–9 HCP → Invitational hand
- 10+ HCP → Game-going hand
- 16+ HCP → Slam interest
Step 2: Use the Right Convention
1. Pass (0–7 HCP, no long major)
If you have a weak, balanced hand, just pass — partner already has 15–17, and game isn’t possible.
2. Stayman (2♣)
    - Used with 8+ HCP and at least one 4-card major.
- Asks opener if they hold a 4-card major:
        - 2♦→ no 4-card major
- 2♥→ 4 hearts
- 2♠→ 4 spades
 
- Responder then places the contract in a major fit, or in NT if no fit.
3. Jacoby Transfers (2♦ → 2♥, 2♥ → 2♠)
    - Used with 5+ cards in a major (any strength).
- Responder transfers so the 1NT opener declares (strong hand hidden).
- After the transfer:
        - With weak hand → pass.
- With invitational hand → bid 2NT(5-card major + invitational values).
- With game values → bid 3NTor raise the major to game (4M).
 
4. Texas Transfers (4♦ → 4♥, 4♥ → 4♠)
    - Used with 6+ card major and game values (10+ HCP).
- Directly forces game in the major.
- Example: With ♠KQJxxx and enough points, respond 4♥(transfer to spades → opener bids4♠).
5. Invitational (8–9 HCP, balanced)
- Bid 2NT→ invites opener to bid3NTwith a maximum.
- Or transfer + 2NTto show invitational values with a 5-card major.
6. Game (10–15 HCP)
- Balanced: Jump to 3NT.
- With a 5-card major: Transfer, then bid game (3NTor4M).
- With both majors (5–4): Start with Stayman.
7. Slam Tries (16+ HCP)
- Use Stayman or transfers first, then explore slam with cue-bids or quantitative 4NT.
- Quantitative 4NT = “Partner, bid 6NT if maximum, otherwise pass.”
- Use Blackwood (or RKCB) if a major fit is established.
Summary Table
| Your Points | Typical Action | 
|---|---|
| 0–7 | Pass, or transfer to a long major and pass | 
| 8–9 | Invite ( 2NT, or transfer +2NT, or Stayman) | 
| 10–15 | Bid game ( 3NTor4Musing Stayman/transfer) | 
| 16+ | Explore slam (Stayman/transfer + quantitative 4NTor Blackwood) | 
Bridge Conventions: Stayman, Jacoby Transfers, and Texas Transfers
Stayman Convention (2♣ after 1NT)
    Purpose
The Stayman convention is used when responder holds at least one 4-card major and wants to check whether opener also has a 4-card major. Playing in a 4–4 major fit is usually better than in no-trump because:
- You may get an extra trump trick.
- Declarer often has an easier time handling side suits.
- It scores just as well (4♥/4♠= game, like3NT).
Mechanics
- After partner opens 1NT, responder bids 2♣.
- This is an artificial asking bid — it does not show clubs.
- Opener’s replies:
        - 2♦→ Denies holding a 4-card major
- 2♥→ Shows at least four hearts
- 2♠→ Shows at least four spades
 
Responder’s Follow-ups
- Invitational (8–9 HCP): If opener shows a major fit → invite game in that suit; if no fit → place in 2NT.
- Game strength (10+ HCP): Raise opener’s major to 4♥or4♠if a fit is found; if no fit → bid3NT.
- Slam interest (16+ HCP): Start with Stayman, then cue-bid or use quantitative 4NT.
Jacoby Transfers (2♦ → 2♥, 2♥ → 2♠)
    Purpose
Jacoby Transfers allow the responder to show a 5-card or longer major suit while keeping the stronger 1NT hand as declarer. This hides declarer’s strength from the defenders and often gives a positional advantage against the opening lead.
Mechanics
- After 1NT:
        - 2♦= transfer to hearts (opener must bid- 2♥).
- 2♥= transfer to spades (opener must bid- 2♠).
 
- The responder is forcing opener to accept the transfer.
Responder’s Follow-ups
- Weak hand (0–7 HCP): Pass after transfer is completed.
- Invitational hand (8–9 HCP): Transfer, then bid 2NT(showing 5M + invitational strength).
- Game-going hand (10+ HCP): Transfer, then bid 3NT(5M + game values) or raise the major to4Mwith 6+ cards.
- Slam interest: Transfer, then explore further with cue bids, splinters, or Blackwood.
Texas Transfers (4♦ → 4♥, 4♥ → 4♠)
    Purpose
Texas Transfers are like “super transfers.” They show a 6+ card major suit with game-forcing values and jump immediately into game, while still ensuring the 1NT opener plays the hand. This saves bidding space and avoids giving away information unnecessarily.
Mechanics
- After 1NT:
        - 4♦= transfer to hearts (opener must bid- 4♥).
- 4♥= transfer to spades (opener must bid- 4♠).
 
Responder’s Use
- Shows a 6-card (or longer) major and at least game-forcing strength (10+ HCP opposite 1NT).
- Does not promise slam interest (otherwise responder would use Jacoby first).
- Example: ♠KQJxxx ♥xx ♦xx ♣Qxx → Respond 4♥(transfer to spades).
Possible Extensions
- Some partnerships allow Texas Transfers with weaker hands (6-card major + 0–7 HCP) as a pre-emptive tactic.
- In standard use, however, it shows a long strong suit and game-forcing hand.
Quick Comparison
| Convention | Starting Bid | Promises | Goal | 
|---|---|---|---|
| Stayman | 2♣ | 8+ HCP + at least one 4-card major | Find a 4-4 major fit | 
| Jacoby Transfer | 2♦/2♥ | 5+ card major, any strength | Show 5M, keep opener declarer | 
| Texas Transfer | 4♦/4♥ | 6+ card major, game values | Go straight to 4M with opener declarer |