A.5. One NT Opening
Balanced or semi-balanced No 5c Major 13-15 HCP

A.5.1. Responses:
2 ♣
Non forcing Stayman
2 ♦/♥
Transfer ♥/♠
2 ♠/NT
Transfer ♣/♦
3 ♣/♦
5+c♣ & 5+c♦ - Weak/GF
3 ♥/♠
Singleton ♥/♠ 3c♠/♥ & 5c-4c both minors - GF
3 NT
To play
4 ♣
4 aces asking - Gerber (A.1.5). Step responses
Responder’s 5 ♣ any time bid: 4 Kings asking
Step responses again
4 ♦/♥
Texas transfer ♥/♠
4 ♠
Slam invitational with 4c♣ & 4c♦
4 NT
Slam invitational with 3c-3c-3c-4c
Min Pass. Max 4 aces step responses
5 NT
7 NT invitational. Min 6 NT. Max 7 NT

1 NT - 2 ♣ Continuation Non forcing Stayman
2 ♦
Denies 4c Major
2 ♥
4c♥ - maybe 4c♠
2 ♠
4c♠ - denies 4c♥

1 NT - 2 ♣ - 2 ♦ Continuation Denies 4c♥/♠
Pass
4+c♦ & 4c♥ & 4c♠ – Drop dead Stayman
2 ♥/♠
4+c♥ & 4+c♠ - Crawling Stayman. Pass/Correction
2 NT
Game invitational - No promising 4c Major 9-11 HCP
3 ♣/♦
4cMajor & 5+c♣/♦ - Slam try
3 ♥
4+c♥ & 5+c♠ Smolen GF
3 ♠
4c♠ & 5c♥ Smolen GF. Opener bids 3 NT or 4 ♥
3 NT
To play
4 ♦/♥
Late transfer ♥/♠

1 NT - 2 ♣ - 2 ♦ - 3 ♣/♦ Continuation 4c Major & 5+c♣/♦ Slam try
3 NT
To play
4 ♣/♦
Max
5 ♣/♦
Min

1 NT - 2 ♣ - 2 ♦ - 3 ♥ Continuation Smolen 4c+♥ & 5+c♠ GF
3 ♠
3c♥ - (conventional bid)
3 NT
Denies 3c Major
4 ♠
3c♠ - To play

1 NT - 2 ♣ - 2 ♦ - 3 ♥ - 3 ♠ Continuation 3c♥
3 NT
To play
4 ♦/♥
Transfer ♥/♠

1 NT - 2 ♣ - 2 ♦ - 3 ♥ - 3 NT Continuation Denies 3c Major
Pass
No interest
4 ♦/♥
Late transfer ♥/♠

1 NT - 2 ♣ - 2 ♦ - 3 ♠ Continuation Smolen 5+c♥ & 4c♠ GF
3 NT
To play. Responder passes or with 6c♥ bids 4 ♦ transfer ♥
4 ♥
3c♥ - To play

1 NT - 2 ♣ - 2 ♥ Continuation 4c♥ Maybe 4c♠
Pass
No interest
2 ♠
4c♠ denies 4c♥ Game invitational
2 NT
3 NT invitational - Denies 4c Major
3 ♣/♦
4c♠ & 5+c♣/♦ - Slam try
Replies as 1 NT – 2 ♣ - 2 ♦ - 3 ♣/♦
3 ♥
Game ♥ invitational
3 ♠
4+c♥ - Splinter ♠
3 NT
To play
4 ♦
4+c♥ - Splinter ♦
4 ♥
To play
4 NT
5 aces ♥ Trump asking (A.1.3)

1 NT - 2 ♣ - 2 ♥ - 2 ♠ Continuation 4c♠ Denies 4c♥
Pass
No interest
2/3 NT
Min/max – To play
4 ♠
Max – To play

1 NT - 2 ♣ - 2 ♥ - 3 ♠ Continuation 4+c♥ Splinter ♠
3 NT
Asking bid. Responder min bids 4 ♦
or 4 NT - 5 aces ♥ trump asking (A.1.3)
4 ♥
Min - To play
4 NT
5 aces ♥ Trump asking (A.1.3)

1 NT - 2 ♣ - 2 ♥ - 4 ♦ Continuation 4+c♥ Splinter ♦
4 ♥
Min - To play
4 NT
5 aces ♥ Trump asking (A.1.3)

1 NT - 2 ♣ - 2 ♠ Continuation 4c♠ Denies 4c♥
Pass
No interest
2 NT
Game invitational - No promising 4c Major
3 ♣/♦
4c♥ & 5+c♣/♦ - Slam try
Replies as 1 NT - 2 ♣ - 2 ♦ - 3 ♣/♦
3 ♥
4+c♠ - Splinter ♥
3 ♠
Game ♠ invitational
3 NT
To play
4 ♦
4+c♠ - Splinter ♦
4 ♠
To play
4 NT
5 aces ♠ trump asking (A.1.3)

1 NT - 2 ♣ - 2 ♠ - 3 ♥ Continuation 4+c♠ Splinter ♥
3 ♠
Asking bid. Responder min bids 3 NT or
4 NT - 5 aces ♠ Trump asking bid (A.1.3)
4 ♠
To play
4 NT
5 aces ♠ Trump asking (A.1.3)

1 NT - 2 ♣ - 2 ♠ - 4 ♣ Continuation 4+c♠ Splinter ♣
4 ♦
Asking bid. Responder min bids 4 ♥ or
4 NT 5 aces ♠ Trump asking bid (A.1.3)
4 ♠
To play
4 NT
5 aces ♠ Trump asking (A.1.3)

1 NT - 2 ♣ - 2 ♠ - 4 ♦ Continuation 4+c♠ Splinter ♦
4 ♥
Min/max asking. Responder min bids 4 ♠ or
4 NT 5 aces ♠ Trump asking bid (A.1.3)
4 ♠
To play
4 NT
5 aces ♠ Trump asking (A.1.3)

1 NT - 2 ♦ Continuation Transfer ♥
2 ♥
Accept transfer min
2 ♠/NT / 3 ♣
Accept transfer max 4c♥ & 2c♠/♦/♣
Responder 3 ♦ Retransfer
3 ♥
Accept transfer max 4c♥ Probably 4c-3c-3c-3c

1 NT – 2 ♦ - 2 ♥ Continuation Accept Transfer
Pass
No interest
2 ♠
5c♥ & 4+c♠ Game invitational
2/3 NT
5c♥ Game invitational/GF
3 ♣ /♦
5+c♥ & 4+c♣/♦ Slam try
3 ♥
6+c♥ Slam try
3 ♠
5+c♥ Splinter ♠
4 ♣ /♦
5+c♥ Splinter ♣ /♦
4 ♥
To play
4 NT
5 aces ♥ trump asking (A.1.3)

1 NT – 2 ♦ - 2 ♠/NT / 3 ♣ - 3 ♦ - 3 ♥ Continuation Accept retransfer
Pass
No interest
Any
Cue Bid Slam try
3 NT
Top honor (Ace or King) in 2c asking bid.
Opener Cue Bid with top honor or 4 ♥ without
4 ♥
To play

1 NT – 2 ♦ - 3 ♥ Continuation Accept transfer max. Probably 4-3-3-3
Pass
No interest
Any
Cue Bid – Slam try
4 ♥
To play
4 NT
5 aces ♥ trump asking (A.1.3)

1 NT - 2 ♥ Continuation Transfer ♠
2 ♠
Accept transfer
2 NT / 3 ♣/♦
Accept transfer max 4c♠ & 2c♥/♣/♦
Responder 3 ♥ Retransfer
3 ♠
Accept transfer max 4c♠ - Probably 4-3-3-3

1 NT - 2 ♥ - 2 ♠ Continuation Accept transfer
Pass
No interest
2 NT
5c♠ - Game invitational
3 ♣/♦/♥
5c♠ & 4+c♣/♦/♥ – Slam try
3 ♠
6+c♠ - Slam try
3 NT
5c♠ - GF
4 ♣/♦/♥
5+c♠ - Splinter ♣/♦/♥
4 ♠
To play
4 NT
5 aces ♠ trump asking (A.1.3)

1 NT – 2 ♥ - 2 NT/ 3 ♣/♦ - 3 ♥ - 3 ♠ Continuation Accept retransfer
Pass
No interest
3 NT
Top honor (Ace or King) in 2c asking bid.
Opener Cue Bid with top honor or 4 ♠ without
4 ♠
To play
4 NT
5 aces ♠ trump asking (A.1.3)

1 NT – 2 ♥ - 3 ♠ Continuation Accept Transfer max. Probably 4-3-3-3
Pass
No interest
4 ♣/♦/♥
Cue Bid - Slam try
4 ♠
To play
4 NT
5 aces ♠ trump asking (A.1.3)

1 NT - 2 ♠ Continuation Transfer ♣
2 NT / 3 ♣
Accept transfer max/min

1 NT - 2 NT Continuation Transfer ♦
3 ♣/♦
Accept transfer max/min

1 NT - 3 ♦ Continuation 5+c♣ & 5+c♦ GF
3 ♥
A♥ & both minor tolerance
3 ♠
A♠ (denies ♥) & both minor tolerance
3 NT
To play
4 ♣/♦
5 aces ♣/♦ trump asking (A.1.1)
5 ♣/♦
To play

1 NT - 3 ♦ - 3 ♥ Continuation A♥ & both minor tolerance
3 ♠
♠ Exclusion aces ♣ trump asking (A.1.4)
3 NT
♠ Exclusion aces ♦ trump asking (A.1.4)
4 ♣/♦
5 aces ♣/♦ trump asking (A.1.1)
5 ♣/♦
To play

1 NT - 3 ♦ - 3 ♠ Continuation A♠ & both minor tolerance
3 NT
To play
4 ♣/♦
5 aces ♣/♦ trump asking (A.1.1)
5 ♣/♦
To play

1 NT - 3 ♥ Continuation Singleton ♥, 3c♠ & 5c-4c both minors GF
3 ♥
5c minor asking
3 NT
To play
4 ♣/♦
5 aces ♣/♦ trump asking (A.1.1)
4 ♠
To play
4 NT
5 aces ♠ trump asking (A.1.3)
5 ♣/♦
To play

1 NT - 3 ♠ Continuation Singleton ♠, 3c♥ & 5c-4c both minors GF
3 NT
To play
4 ♣/♦
5 aces ♣/♦ trump asking (A.1.1)
4 ♥ / 5 ♣/♦
To play
4 ♠
5c minor asking bid
4 NT
5 aces ♥ trump asking (A.1.3)

1 NT - 4 ♠ continuation Invitational slam with 4c♣ & 4c♦
4 NT
No 4c minor min
5 ♣
4+c♣/♦ & 5 aces ♣/♦ trump asking
14-30 step responses
6 NT
No 4c minor max

Any time 4 NT 5 aces asking bid (A.1.3)
Responses RKCB 14-30 & PODI/PORI.

A.5.2.1. 2nd level Interference continuation Rubinsohl
·   DBL - Penalty.
·   Cue Bid - Stopper promising Stayman - GF.
·   2 any - To play.
·   2 NT - Transfer ♣. Opener bids 3 ♣.
o  Lower interference new suit - To play.
o  Cue Bid - Stayman denies stopper.
o  Higher interference’s new suit - GF.
·   3 ♣/♦/♥ - Transfer ♦/♥/♠.
·   3 ♠ - Transfer 3 NT non-promising stopper.
·   3 NT - To play promising stopper.
·   4 ♣ - 4 aces asking Gerber (A.1.5). Step responses.
·   4 ♦/♥ - Transfer ♥/♠.

A.5.2.2. 3rd level Interference continuation
·   DBL - Penalty.
·   Cue Bid - Stopper promising Stayman - GF.
·   Any - To play.
·   4 ♣ - 4 aces asking Gerber (A.1.5). Step responses.
·   4 ♦/♥ - Transfer ♥/♠.

A.5.2.3. 4th level Interference continuation
·   DBL:
A. After ♣/♦/♥ - Take out.
B. After ♠ - Penalty.
·   4 NT:
A. After ♣/♦/♥ - To play promising stopper.
B. After ♠ - Take out.
·   5 NT - Slam invitational.

A.5.3. Double continuation
Direct double - Exit transfer:
·   Pass - Transfer RDBL. Opener RDBL.
o  Pass - 9+ HCP.
o  New suit - 0-8 HCP.
Opener passes with 3+c or bids next step suit.
Responder passes with 4c or bids next 4c suit & opener pass.
·   RDBL - Transfer ♣.
·   2 ♣/♦/♥ - Transfer ♦/♥/♠.
·   2 ♠ - 5c♥ & 5♠.
·   2 NT - 5c♣ & 5c♦.
Ignoring any Double after transfer.

A.5.4. Stayman Double continuation
·   Pass - 4c♣ No 4c Major.
·   RDBL - 5+c♣ No 4c Major.
·   2 ♦ - No 4c♣ No 4c Major.
·   2 ♥ - 4c♥.
·   2 ♠ - 4c♠.