OP	RESP
1!c	?

1!d!h

Transfer.

1!s

Nat unbal, may have 3-card support.

1M

NT-hand. XY-NT.

1NT

15+ clubs, 3-card support.

2!c

NF.

2!d

ART GF.

2M

NF (may still be four).

2oM

ART GF, sets the major.

2NT

INV.

3!c

INV.

3M

INV.

2!c

Nat, 15–17 no support.

2!d

15+ clubs, four card support.

2M

NF.

2oM

ART GF.

2NT

INV to 4M.

2M

NT-hand, four card support.

Others

Strong with clubs.

1!s

No major.

1NT

Nat.

2!c

Clubs, 15–17.

Other

18+ with clubs.

1NT

Invitational.

2!c

Nat GF unbal.

2!d

Nat GF unbal.

2!h!s

Weak

2NT

GF, ca 13–15. Wants to declare.

3!c!d

Nat INV.

OP	RESP
1!d	?

1!h

Negative, 0–8 (all others 9+).

1!s

15–21 with diamonds.

1NT

Semi-positive, forcing.

2!c

Three-suited, short clubs. 2X is non-forcing, 3X is GF.

2!d

15–18, no major.

2!h!s

15–18, 4M and 5+!d.

2NT

15+ with 5-5 minors. 3m is NF, 3M shows stopper.

3X

Nat GF.

2!c

0–4, “take out of diamonds”.

2!d

0–4, suggestion to play.

2!h!s

0–4 with six card suit.

3X

GF based on diamond support, shows stopper.

1NT

18–20.

2!c

Any GF. 2!d waiting, others NAT positive.

2!d

Strong multi
a) 19–21 with 6+M.
b) 23–24 NT.

2!h

P/C.

2!s

ART F1.

2NT

Nat.

3!c

Extras hearts.

3!d

Extras spades.

3!h!s

Nat min.

2!h!s

6+M, 15–18.

2NT

21–22 NT.

3!c

GF 5-5 clubs + major. 3!d asks.

3!d

GF 5-5 diamonds + hearts.

3!h

GF 5-5 majors.

3!s

GF 5-5 spades + diamonds.

1!s

Catch-all.

1NT

Balanced or three-suited. Natural continuation.

2!c

Any 22+. 2!d waiting, others NAT.

2!d

Diamonds, 15+.

2M

Nat, 6+M and 15+.

2NT

5-5 minors.

3!c

5+!d and 4!c.

3!d

6+ diamonds, good suit.

3!h!s

4M and 6+!d.

1NT

Unbal, 5+!h.

2!c

Unbal, 5+!s.

2!d

Unbal, 6+!c.

2!h

Unbal, 6+!d.

2!s

5-5 majors.

2NT

5-5 minors.

Special bids for 1!h

OP	RESP
1!h	?

1!s

ART F1, like a forcing NT.
0–4!s. Might have 3!h if 0–7.

1NT

4+!c.

2!c

4+!d.

2!d

4+!s.

2!h

6+!h, 10–14.

2!s

Nat 16+.

2NT

17+, 5-5.

3!c

P/C.

3!d

Asks suit, up the line.

3!h

NF.

3!c!d

15–17, 5-5.

3!h

12–14, 7!h.

1NT

5+!s, F1.

2!c

4+!d (might have support).

2!d

4+!c (might have support).

2!h

6+!h, 10–14.

2!s

Min, 3+ support.

2NT

17+, 5-5.

3!c

P/C.

3!d

Asks up the line.

3!c!d

15–17, 5-5.

3!h

12–14, 7!h.

3!s

14–16, 4!s. 3NT asks SPL.

3NT

17+, 4-5-2-2.

4!c!d

17+, SPL and 4 card support.

---

Special bids for 1!s

OP	RESP
1!s	?

1NT

Might have 3!s if 0–7.

2!c

4+!d.

2!d

4+!h.

2!h

4+!c.

2!s

10–14, 6+!s.

2NT

17+, 5-5.

3!c

P/C.

3!d

Asks up the line.

3new

15–17, 5-5.

3!s

12–14, 7!s.

---

Common for either major

OP	RESP
1M	?

2!c

ART. Nat GF / Bal GF / 3-card limit.

2!d

ART. Waiting, two-suited ca 10–16.

2M

Limit.

2NT

Bal GF.

Others

GF with clubs.

2M

10–14 with 6+M. Raise = INV.

2NT

Major + diamonds, GF.

Other

Nat GF.

2!d

Nat GF.
2NT rebid is 6+M, 2M is waiting.

2M

8–10, 3-card raise.

2!h

Nat GF.
2NT rebid is 6+M, 2M is waiting.

2!s

INV.

2NT

INV Skrot Stenbergs, 4-card supp.

3!c!d!h

INV.

3M

Mixed raise.

Contested notes

OP	RESP
1NT	?

Pass

Less than INV vs strong NT.

2!c

Asks strong hand to bid 2!d. Lots of hands.
Includes most INV+ hands with 5+M.

Responder may have: Weak with 5+!d, weak with 6+!c, INV+ with 5+ major (but not 5-4 majors), INV+ without a major.

2!d

Strong NT.

2!h

INV+ with 5+!s.

2!s

Minimum.

2NT

INV that doesn’t want to pass.

3!c!d

Nat GF.

3!h

INV 5-5 majors.

3!s

INV with 6!s.

3NT

5!s, unbal but NF.

4!c!d!h

Splinter.

4!s

To play.

2NT

Max, no support (GF).
Continuations as after 2!s minimum.

3!c

Max with support.
New suit NAT. 3M any SPL. 3NT asks cue.

2!s

Weak with clubs, or INV+ without major.

2NT

Minimum.

3!c

To play.

3!d

Minor suit Stayman.

3!h

4+!c.

3!s

5+!d.

3NT

To play.

4!c

Sets trump.

3!s

4+!d, not 4!c.

3NT

5!c, NF but SI.

4!c!d

Sets trump.

3NT

No minor.

3!h

Slam interest with 5-5 minors.

3!s

Okay hand.

3NT

Bad hand.

4!c!d

Good hand, sets trump.

3!s

Slam interest, asks five card suit.

3NT

Nope. Now 4X is natural up the line,
bid at 5-level is RKC response with fit.

4X

Five card suit.

3NT

To play.

4!c!d

Natural slam interest.

4!h!s

5-5 minors and void major.

4NT

Ace asking.

3!c

Maximum. As above.

2NT

INV with 5!h.

3!c!d

GF with 5!h and 4+m.

3!h

INV with 6!h.

3!s

GF with 5+!h.

3NT

No support.

4!c!d

Cue, SI and 6+!h.

4!h

To play.

4!c!d

Cue.

4!h

Min and support.

3NT

To play.

4!c!d

Splinter with long hearts, slam interest.

4!h!s

To play.

2!h!s

Weak. 2NT is Ogust.

2!d

Transfer, 4+!h.

Responder may be weak with 5+!h, or INV+ with 4!h, or INV+ with both majors (GF if 5-5).

2!h

The strong hand.

2!s

Forcing, at least 4-4 majors.

2NT

Minimum, no major.

3!c

Undefined.

3!d!h

Transfer with 5-4 majors, INV+.
Bidding 3M is NF.
4m accepts with fit in corresponding major.

3!s

GF, 5-5 majors.

3NT

COG with 4-4 majors.

4!c!d

SAT with 6-4 majors.

3!c

Any max. As 2NT above.

3!h!s

Minimum, 4+ major.

2NT

INV with 4!h.

3!c!d

GF with 5+m and 4!h.

3!h

Balanced COG with 5!h.

3!s

1-4-4-4.

3NT

COG with 4!h.

2!s

Weak. 2NT is Ogust.

2NT

Strong max with 4!h.

3!d

Weak with 6!h.

2!h

Transfer but NF, 4+!s.

Pass

Weak with hearts.

2!s

Strong NT.

2NT

INV with 4!s.

3!c!d

GF with 5+m and 4!s.

4!h

4-1-4-4, GF.

3!s

Balanced COG with 5!s.

3NT

COG with 4!s.

2NT

Strong max with 4!s.

3!h

Weak with 6!s.

2!s

Forcing with 4+!s.

2NT

Strong NT, not 4!s.

3!c!d

5+ suit.

3!h

4-1-4-4.

3!s

Balanced SI.

3NT

To play.

3!c

Strong NT with 4+!s.
New = cue, 3NT COG.

3!d

Weak, 6+!h.

3!h

INV.

3!s

Asks SPL.
3NT no, 4X up the line.

3NT

To play.

4!c!d

Nat SI.

4!h

To play.

3!s

Weak, 6+!s (forcing).

2NT

Strong balanced, forcing.

3!c

Strong NT.

3!d

Minor suit Stayman.

3!h!s

4+ corresponding minor.

3NT

No minor.

3!h!s

Four card suit.

3NT

To play.

3!d!h

Weak transfer.

Accept

INV.

3M+1

Asks SPL.

4M

To play.

3X

Natural GF.

The weak variant bids his major at the 3-level, holding bad support for responder’s suit (over 1NT–3!s, bid 3NT instead to show hearts and bad support). With the strong hand bid the lowest possible bid which do not show the weak hand. With the weak hand, support and min, raise the suit. With the weak hand, support and max, bid anything not mentioned above.

If second hand doubles, whatever the double means:

• Pass is to play vs the strong hand. Weak hand bids his suit if fourth hand passes. If fourth hand bids opener usually passes no matter what he have, but bids shows the strong hand (take-out doubles and natural suit bids).
• Redouble is a transfer to 2!c, but weak hand may bid his suit with poor club support.
• All other bids are sys-on.

If second hand overcalls, responder bids as if opener was strong but needs some kind of support for the unbid major(s) (unless very strong, wanting to play game whatever opener have). Double is take-out: Weak hand bids his suit (or passes), strong hand has to jump if holding a major. Bids at the two-level are non-forcing, but strong hand may raise and weak hand may bid his suit (but may also pass). Bids at 3-level are GF vs strong hand (weak hand bids his suit). 2NT is Lebensohl, but weak hand bids his suit. The best option if they overcall is usually to double or pass.

If fourth hand bids opener passes with the weak hand (unless responder has said something positive about opener’s major, or has bid 2NT+) or bids his major if fourth hand doubles. Strong hand has to act if responder has bid. If responder has passed, double by opener is take-out with the strong hand.

OP	RESP
2!c	?

2!d

ART INV+.

2!h

4!d.

2!s

6+!c max, not suitable for NT.

2NT

6+!c max.

3!c

6+!c min.

2!h!s

Nat F1.

2NT

Good raise.

3!c

Preemptive.

3X

Nat GF.

OP	RESP
2!d	?

2!h

ART INV+.

2!s

4!c.

2NT

6+!d max.

3!c

6+!d max, not suitable for NT.

3!d

6+!d min.

2!s

Nat F1.

2NT

5+!h, F1.

3!c

Good raise.

3!d

Preemptive.

3!h!s

Nat GF.

OP	RESP
2!h!s	?

2!s

Constructive but NF.

2NT

ART INV+.

3!c!d

Nat min.

3!h!s

Max corr min.
3!s asks if six card suit (3NT no).

3NT

Max 6!d.

3/4!c

P/C.

3!d

GF, major fit.

3!h

Singleton in oM.
3!s asks minor (3NT = !d).

3!s

Singleton !c.

3NT

Singleton !d.

4!c!d!h

Void.

3M

INV.

3oM

Nat GF with 6+ suit.

3NT

To play.

4NT

Asks minor.

OP	RESP
2NT	?

3!c!d

NF.

3!h

GF, asks SPL (3NT = short !h).

3!s

Slam try, no 3+m.
Opener bids 4m with good 6m.

3NT

To play.

4!c!d

INV.