1C/D (m): Natural, best minor

3/4/5m: 5+ fit, pre-empt
2m: 4+ fit, round forcing. At least the equivalent of a limit raise to 3m.

3NT: 18-19 HCP, exactly 3 cards in opening suit
2NT: Round forcing, stoppers in the other suits

3m: Sign off
New suit: Singleton in the suit.
4m: RKCB
Jump in a new suit: Asking bid in the suit (See “Slam conventions”)
NT: Quantitative

New suit (X): Forcing, stopper, denies stopper(s) in any lower un-bid suit

3m: Sign off
New suit: Forcing, stopper, denies stopper(s) in any lower un-bid suit.
NT: Quantitative with all remaining stoppers
3X: Splinter.
4m: RKCB
4X or Jump in a new suit: Asking bid in the suit (See “Slam conventions”)

Jump in new suit: Splinter
4m: RKCB
3m: Minimum, unbalanced
Double jump in a new suit: Asking bid in the suit (See “Slam conventions”)

2C over 1D : 4+ suit, Forcing to 4C or 4D

3NT: 15-17 HCP, 4441
2NT: Stoppers in the majors
2H/S/3C: 5-4, at least a good opening hand (less than a reverse)
3H/S: Splinter. Fit in clubs
4C: RKCB with trump clubs
3D: 6+ good suit, at least a good opening hand (less than a reverse)
2D: Otherwise (may have 3 small diamonds in the worst case)<>

1D (Walsh): Natural, round forcing. If done with a 4-card major suit, it must be with Game Forcing values.

1M: 4+ suit, unbalanced

1S: 4^th Suit Forcing

1NT: 11-14 HCP, 5-4, stopper in spades
2C: 11-14 HCP, 5+ clubs and 4 hearts, no spade stopper
2D: 11-14 HCP, 1435
2H: 15-17 HCP, 5+ clubs and 4 hearts, no spade stopper
2S: 11-14 HCP, 4414 or 4405
2NT: 15-17 HCP, 5-4, stopper in spades
3C: 15-17 HCP, 6+ clubs and 4 hearts
3D: 15+ HCP, 1435
3H: 6+5+ clubs and hearts
3S: 15-17 HCP, 4414 or 4405
3NT: 18-19 HCP, 5-4, stopper in spades

2M: 15+ HCP, 4+ fit
3M: 10-11 HCP, 4-card fit
4M: 12-14 HCP, 4-card fit, no short suit
4D: 4-card fit in H/S with 5422 concentrated in the 2 long suits
Jump in M': 6+5+
Double Jump in M': Splinter
3C: Invitational
3D: Invitational

1NT: 12-14 HCP, balanced, may have 4-card major suit(s)
2M: 5+4+, reverse
2NT: 18-19 HCP, balanced, may have 4-card major suit(s)
3M: Splinter

1M: Forcing for one round, 4+ suit

1S

1NT

3H: 15-17 HCP, 4315/4351
2D/C (the other minor): Same but 12-14 OR 18-19
2H: 14-16 HCP, 4315/4351/4324/4342

1NT: 12-14HCP, balanced

2C: Non-forcing Checkback
2D: Forcing Checkback
2M: Sign off, 5+ suit
3M: 6+ suit, limit (usually with good suit)
2H after 1S: Sign-off, 5+5+
Reverse or jump in a new suit: 5+5+ , Non-forcing

2NT: 18-19HCP, balanced

3C: Wolf sign off
3H after 1S: 5+5+ in majors, slam interest
4H after 1S: 5+5+ in majors, choice of game
4M: Sign off
Other: Natural, forcing

New suit: Not forcing
Jump (or reverse) in new suit: Forcing
Repeat opening suit: Not forcing, 5+ suit
Jump in opening suit: Not forcing, 6+ good suit
Double jump in new suit: Splinter. Fit in responder's suit
2/3M: Limit, 4+ fit
4M: Sign-off, 6+4+
4C/D: Slam try in responder's suit with a good 5+ opening suit
3NT: 4+ fit, strongest possible bid, balanced or semi-balanced

3C over 1D or 2D over 1C: Good 6+ suit, weaker than 2C over 1D
3D over 1C: Pre-empt
4C over 1D or 4D over 1C: Good suit and big fit
2/3/4H/S: Pre-empt
1NT: 8-10 HCP over 1C; 6-10 HCP over 1D
- 2NT: Values for 3NT, short in the other minor
2NT: Invitation to 3NT
3NT: Sign off, no interest in slam

Responses after opponent’s Takeout DBL

Simple & Jump raises not inverted
1NT: To play
2NT: 5+ fit limit or stronger; Round forcing
1/1: Natural, forcing
2/1: Natural, non-forcing
RDBL: 9+ HCP, does not deny 4-card fit
Jump shift: Weak, constructive
Double jump shift (if not game): Good suit and fit in opener's suit

Responses after opponent's natural over-call

Simple & Jump raises not inverted
NT: Stopper, limit
DBL: Negative up to 4D
New suit: Natural, round-forcing
Cue-bid: Asking for a stopper or 4+ fit, limit+
Jump cue-bid: Splinter
Jump shift: Weak, constructive
Double jump shift (if not game): Good suit and fit in opener's suit