BBO GIB Definitions
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Point Count
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Total Points (TP) = high card points (HCP) + short-suit points
HCP: Ace=4, King=3, Queen=2, Jack=1 (the 10 is not worth any high card points but is considered a fifth honor card when counting honor cards)
Short-suit points: void=3, singleton=2, doubleton=1, subtract 1 if suit has honors
Suit Strength
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Biddable (one of the following must be true):
4 card suit with Q-J-10 or
4 card suit with K or
5 card suit (any 5 card suit is biddable)
Rebiddable:
Biddable + 1 card
Twice rebiddable:
Rebiddable + 1 card
Strong rebiddable:
Twice rebiddable with 4 of 5 honors or A-K-Q
Solid 6-card:
A-K-Q-T-x-x or better
Solid 7-card:
A-K-Q-x-x-x-x or better
Solid 8-card:
A-K-J-x-x-x-x-x or better
Suit Stoppers
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Partial stop
Length + HCP = 4 (Q-x or J-x-x)
Likely stop
Length + HCP at least 5 (K-x or Q-x-x)
Stop
A, or Q-J-x, or K-Q, or length + HCP at least 7
Two Stop
Length + HCP at least 8
Force
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One Round
Player receiving the signal cannot pass during that round
Game
Player receiving the signal cannot pass until game is reached but need not bid game immediately
Other Bid Descriptions
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Cue
Two meanings: an early bid of an opponent’s suit to as a one round force or a late bid in a new suit to signal specific honors
Splinter
A double jump in a new suit showing a singleton or void in the suit bid
Notes Specific to the Partnership Agreement
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No Bid/Category Fit
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No Bid Fit
If two adjacent bids each fail to describe your hand, step down to the less distorting or weaker bid.
No Category Fit
If two adjacent categories each fail to describe your hand, step down to the preceding category.
Treat Overcalls as Cross Outs
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Biding After Opponent Overcalls When None of the Listed Responses in "Overcalls" Apply
Use a "cross out" approach. Treat available responses in the abscence of overcalls as unchanged. Ignore responses that became unavailable. Sometimes this will mean passing when you would have bid in the abscence of an overcall.
Game Force Take Back
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Kill Switch After a Game Force
Always use a game forcing bid when it would be the appropriate bid based on your hand. If you want to take back the game force, make a minimum rebid in your suit at the next opportunity.
Slam Bidding Signals
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Cue Bids
A bid of opponents' suit at the four level and higher or a new suit bid at the four level and higher always advertises an Ace or void in the suit bid.
Splinter Bids
A double jump in a new suit is always a splinter bid.
Blackwood Convention
4 NT after a suit opening is always Blackwood. It is never an invite to 6 NT.
Gerber Convention
4 Clubs after a NT opening is always Gerber
Opening Bids
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One of a Suit or One NT
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1 Heart or Spade:
11-21 HCP and 12-22 TP
5+ cards
Unbalanced hand or 5-3-3-2 distribution not meeting HCP requirements for 1 NT or 2 NT
1 Club or Diamond:
11-21 HCP and 12-22 TP
3+ cards
Denies five card major
Unbalanced hand or 5-3-3-2 distribution not meeting HCP requirements for 1 NT or 2 NT
1 NT:
15-17 HCP
Balanced hand or 5-3-3-2 distribution meeting HCP requirements for 1 NT
Pre-emptive (Weak) Openings
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2 Diamonds, Hearts, or Spades:
7-10 HCP and 7-10 TP
6+ cards with Q or better
3 Clubs, Diamonds, Hearts or Spades
5-9 HCP, 6-10 TP
7+ cards with Q or better
4 Clubs, Diamonds, Hearts or Spades
5-9 HCP, 6-10 TP
8+ cards with Q or better
Strong Openings
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2 NT:
20-21 HCP
Balanced hand or 5-3-3-2 distribution meeting HCP requirements for 2 NT
2 Clubs:
22+ HCP, 23 TP
Unbalanced hand or 5-3-3-2 distribution not meeting HCP requirements for 3 NT
3 NT:
25-27 HCP
Balanced hand or 5-3-3-2 distribution meeting HCP requirements for 3 NT
Responding to an Opening Bid by Passing
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Any Partner Opening Bid Except 2 Clubs
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0-5 HCP, 0-6 TP
Any Opponent Opening Bid
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0-8 TP
Responding to Partner Opening One of a Major
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Raises
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2 Hearts or Spades
7-10 TP
3+ cards
2 Spades (over 1 Heart)
10-12 TP
3+ cards
2 NT
13+ TP (not HCP, this is Jacoby 2 NT, an artificial bid)
4+ cards
3 Hearts or Spades
10-12 TP
4+ cards
4 Hearts or Spades
5-8 TP
5+ cards
Spades (over 1 Heart) or NT at One Level
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1 Spade
6-16 TP
4+ cards
Denies three card support for hearts
1 NT
6-12 TP (not HCP)
Denies four card support for hearts
Denies four cards in other major
One round force
New Suit at Two Level (Two Over One)
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2 Clubs or Diamonds
13+ HCP, 14+ TP
Biddable suit
Game force
2 Hearts
12+ HCP, 13+ TP
Biddable suit
Game force
2 Spades
17+ TP
Rebiddable suit
Game force
New Suit or NT at Three Level
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3 Clubs, Diamonds, Hearts or Spades
9-11 HCP
6+ cards with Q or better
Denies three card support for partner’s suit
3 NT
13-15 HCP
Balanced hand
3+ card support for partner’s suit
Gives partner choice of game
New Suit at Four Level
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4 Clubs, Diamonds, Hearts, or Spades (a splinter bid)
13-16 TP
4+ card support for partner’s suit
Responding to Partner Opening One of a Minor
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Raises
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2 Clubs or Diamonds
10+ HCP
4+ cards
Denies a four card major
3 Clubs or Diamonds
6-10 TP
5+ cards
Denies a four card major
New Suit or NT at One Level
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1 Diamond, Heart or Spade
6-16 TP
4+ cards
1 NT
6-10 HCP
Balanced hand
New Suit or NT at Two Level
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2 Clubs
14+ TP
4+ cards
Game force
2 Diamonds, Hearts or Spades
17+ TP
Rebiddable suit
Game force
2 NT
11-12 HCP
Balanced hand
Partial stop in unbid suits
New Suit or NT at Three Level
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3 Clubs, Diamonds, Hearts or Spades (a splinter bid)
14+ TP
5+ cards in support of partner’s suit
3 NT
13-15 HCP
Balanced hand
Partial stop in unbid suits
New Suit or NT at Four Level
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4 Hearts or Spades
6-10 HCP
Strong rebiddable suit
Responding to Partner Opening One NT
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Go to the BBO GIB definitions of conventions and transfers
Stayman Convention
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2 Clubs
8+ HCP, 9+ TP
Jacoby Transfer
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2 Diamonds or Hearts
8+ HCP, 9+ TP
5+ cards
Minor Stayman
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2 Spades
8+ HCP, 9+ TP
Other Unnamed Transfer Bids
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2 NT
8+ HCP, 9+ TP
6+ cards
3 Clubs
8+ HCP, 9+ TP
6+ cards
Other Responses to NT at Three Level
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3 Diamonds, Hearts or Spades (a splinter bid)
12+ TP
3 NT
10-15 HCP
Balanced hand
Gerber Convention
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4 Clubs
Texas Transfer
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4 Diamonds or Hearts
10+ TP
6+ cards
Other Responses to NT at Four Level
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4 NT
16-17 HCP
Balanced hand
Responding to Partner Other Opening Bids
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Responding to Weak Two Bids
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2 Hearts or Spades
14+ TP
Rebiddable Suit
One round force
2 NT
15+ HCP
One round force
3 Clubs
17+ TP
Rebiddable suit
One round force
3 Diamonds
If you have 9 diamonds between the two hands
3 Hearts or Spades
20+ TP
Strong rebiddable suit
3 NT
18-21 HCP
Partial stop in unbid suits
Responding to Two Clubs
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2 Diamonds
0-7 TP
One round force
2 Hearts or Spades
8+ TP
5+ cards with KQ
One round force
2 NT
8+ HCP
3 Clubs
8+ HCP
5+ cards with KQ
Responding to Three of a Suit
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Raise to 4
2+ cards in support
Continuing the Auction After One of a Major
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Opener Rebid After Partner Responds with One Spade Over One Heart
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Opener’s Rebids of Own Suit
12-18 TP, twice re-biddable, rebid two
17-20 TP, 6+ cards, rebid three
19-22 TP, 7+ & strong re-biddable, rebid four
Opener’s Rebid of One NT
12-14 HCP, balanced hand
Opener’s Rebid of New Lower Suit at the Two Level
12-18 TP, 4+ cards in new suit
Opener’s Simple Raise of Partner’s Spades
12-15 TP, 4+ spades
Opener’s Simple Raise of Partner’s Spades
16-18 TP, 4+ spades
Opener’s Rebid of Two NT
17-19 HCP, balanced hand, partial stoppers
Opener’s Rebid of Three Clubs or Diamonds
19-22 TP, biddable
Opener’s Jump Raise of Partner’s Spades
16-18 TP, 4+ spades
Opener’s Rebid of Three NT
20-21 HCP, balanced hand, partial stoppers
Opener’s Rebid of Four Clubs or Diamonds
19-22 TP, splinter
Opener’s Double Jump Raise of Partner’s Spades
19-22 TP, 4+ spades
Opener Rebid After Partner Responds with One NT
Return to the Table of Contents Opener Rebid After Partner Responds with One NT
Opener’s Rebids of Own Suit
12-16 TP, 6+ cards, rebid at the two level
16-18 TP, 6+ cards, rebid at the three level
Opener’s Rebid of New Lower Suit at the Two Level
12-18 TP, 3+ cards in new suit
Opener’s Rebid of Two Spades After a One Heart Opening Bid (a reverse)
18-22 TP, 4+ cards in spades
Opener’s No-Trump Raise to the Two Level
17-18 HCP, balanced or semi balanced distribution
Opener’s Rebid of New Lower Suit at the Three Level
19-22 TP, 4+ cards in new suit, forcing to at least 3 NT game
Opener’s Rebid of Three Spades After a One Heart Opening Bid
19-22 TP, 5+ spades, 6+ hearts, game forcing
Opener’s No-Trump Raise to the Three Level
19-21 HCP, balanced or semi balanced distribution
Other Opener Rebids
18-22 TP and 7+ in own suit, bid 4 of that suit. With 7+ in own suit and a strong re-biddable second major, bid the second major.
Opener Rebid After Partner Responds with a Simple Raise
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Opener’s Rebids of Own Suit
16-17 TP, rebid at the three level
18-22 TP, rebid at the four level
Opener’s Rebid of Two No Trump After a One Heart Opening Bid
17-18 TP 3+ spades with Q
Opener’s Rebid of New Lower Suit at the Three Level
19-22 TP
Opener Rebid After Partner Responds with a Jump Raise
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Opener’s Rebids of Own Suit
15-20 TP, rebid at the three level
Opener’s Rebid of Three No Trump
17-21 HCP, partial stoppers in unbid suits
Opener’s Rebid of Four Clubs, Diamonds, or Hearts
20-22 TP, cue bid showing A of clubs, diamonds, or hearts
Opener Rebid After Partner Responds with Minor Two Over One
Return to the Table of Contents Opener Rebid After Partner Responds with Minor Two Over One
Opener’s Rebids of Own Suit
12-22 TP, bid two
18-22 TP, strong rebiddable, bid three
12-15 TP, 7+ cards, bid four
Opener’s Rebid of New Lower Suit at the Two Level
12-22 TP, 4+ cards in new suit
Opener’s Rebid of Two Spades After a One Heart Opening Bid
16-22 TP, 4+ cards in spades
Opener’s Rebid of 2 NT
11-14 HCP, balanced or semi balanced distribution
Opener’s Simple Raise of Partner’s Suit
12-22 TP, 4+ card support
Opener’s Rebid of Clubs at the Three Level
16-22 TP, 4+ cards in new suit
Opener’s Rebid of Diamonds at the Three Level
15-21 HCP, 5+ hearts, KQ heading both
Opener’s Rebid of Three Hearts After a One Spade Opening Bid
15-21 HCP, 5+ hearts, KQ heading both
Opener’s Rebid of Three Spades After a One Heart Opening Bid (a splinter bid)
15-21 HCP
Opener’s Rebid of Three NT
11-14 HCP, balanced or semi balanced distribution
Opener’s Rebid of Other Minor at the Four Level (a splinter bid)
14-21 HCP
Opener Rebid After Partner Responds with Two Hearts Over One Spade
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Opener’s Rebids of Spades
12-22 TP, 3 or fewer hearts, rebid two
18-22 TP, strong re-biddable, rebid three
12-15 TP, 7+ cards, bid four
Opener’s Rebid of Two NT
11-14 HCP, balanced or semi balanced distribution
Opener’s Rebid of Three Clubs or Diamonds
16-22 TP, 4+ cards
Opener’s Rebid of Three Hearts
12-22 TP, 3+ cards
Opener’s Rebid of Three NT
17-20 HCP, partial stoppers in unbid suits
Opener’s Rebid of Four Clubs or Diamonds (a splinter bid)
14-21 HCP
Opener’s Rebid of Four Hearts
12-15 TP, balanced, no minor control
Opener Rebid After Partner Responds with Minor at the Three Level
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Opener’s Rebids of Own Suit
14-15 TP, 6+, bid three
16-19 TP, 6+, strong re-biddable, bid four
Opener’s Rebid of Other Major
14-22 TP, 4+ cards
Opener’s Rebid of Other Minor
16-22 TP, 4+ cards
Responder Rebid After Suit Bidding
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Rebids
Simple rebid shows rebiddable suit
Jump rebid shows 6+ cards
Raises
Simple raises show 3+ card support
Jump raises show 4+ cards support
New Suit
4+ cards
A double jump in a new suit is a splinter bid
No Trump
Rebid in NT only if required to continue an auction because it communicates no new information
Responder Rebid After NT Then New Suit by Opener
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New Suit
Minimum suit bid in minor shows biddable suit
Jump suit bid in minor shows a re-biddable suit
2 NT
10-12 TP, balanced hand
3 NT
12 HCP, balanced hand, partial stoppers in unbid suits
Responder Rebid After NT and NT
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New Suit
Minimum suit bid in minor shows 6+ cards
Jump suit bid in minor shows 7+ cards
3 NT
Unusual no-trump (two suited hand)
Continuing the Auction After One of a Minor
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Opener Rebid After Partner Responds with One Over One
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Opener’s Rebids of Own Suit
11-15 HCP, 12-16 TP, twice rebiddable suit, 3 or fewer cards for partner’s suit, bid two
17-20 TP, 6+ cards, 3 or fewer cards for partner’s suit, bid three
20-22 TP, 6+ cards, 4+ cards for partner’s suit
Opener’s Rebid of One Spade After One Heart Response
11+HCP, 12-18 TP, 4 spades
Opener’s Rebid of One NT
12-14 HCP, balanced hand
Opener’s Rebid of Two Diamonds After One Club Open (a reverse)
20-22 TP, 6+ clubs, 4+ diamonds
Opener’s Simple Raise of Partner’s Suit
12-15 TP, 4+ cards
Opener’s Rebid of Two Spades After One Heart Response (a jump shift)
18-21 HCP, 19-22 TP, 5+ clubs, 4 spades
Opener’s Rebid of Two NT
18-19 HCP, partial stoppers in unbid suits
Opener’s Rebid of Three in an Unbid Suit (a splinter bid)
19-22 TP
Opener’s Jump Raise of Partner’s Suit
16-18 TP, 4+ cards
Opener’s Double Jump Raise of Partner’s Suit
19-22 TP, 4+ cards
Opener Rebid After Partner Responds with One NT
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Opener’s Rebids of Own Suit
11+HCP, 12-16 TP, 5+ cards, bid two
17-20 TP, 6+ cards, bid three
Opener’s Rebid of Other Minor at the Two Level
12-18 TP, 4+ cards
Opener’s Rebid of Two Hearts or Spades After One Diamond Open (a reverse)
18-22 TP, 5+ hearts or spades, 4+ diamonds
Opener’s Rebid of Two NT
17-18 HCP
Opener’s Rebid of Three NT
19-21 HCP
Opener Rebid After Partner Responds with Inverted Simple Raise
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Opener’s Rebids of New Suit at the Two Level
Stop in suit bid
Opener’s Rebid of Two NT
11-14 HCP, partial stoppers in unbid suits
Opener’s Rebid of Own Suit at the Three Level
A placeholder bid that communicates no new information
Opener’s Rebid of New Suit at the Three Level (a splinter bid)
16-21 HCP
Opener’s Rebid of Three NT
18-19 HCP, partial stoppers in unbid suits
Opener Rebid After Partner Responds with Inverted Jump Raise
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Opener’s Rebid in Major
18-22 TP, 4+ hearts or spades
Opener’s Rebid of Minor Game
19-21 HCP
Opener Rebid After Partner Responds with a Soloway Jump Shift
Return to the Table of Contents Opener Rebid After Partner Responds with a Soloway Jump Shift
Opener’s Rebid in New Suit
KQ in that suit
Opener’s Rebid in Own Suit
6+ cards
Opener’s Simple Raise of Partner’s Suit
3+ cards
Responder Rebid After One of a Major-One NT
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Rebid
Retreat from NT and shows 5+ cards
Raise
Retreat from NT and shows 5+ cards
New Suit
New minor is forcing
Reverse would show 5+ in open suit and 4+ in responder’s suit and be game forcing to 3 NT
2 NT
11-12 HCP
Responder Rebid After Inverted Raise-New Suit
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New Suit
Partial stopper
3 NT
Partial stoppers in both unbid suits
Responder Rebid After Inverted Raise-New Suit
Return to the Table of Contents Responder Rebid After 1NT-Two of a Suit
New Suit
Partial stopper
Responder Rebid After One of a Major-Opener Rebid Own Suit
Return to the Table of Contents Responder Rebid After One of a Major-Opener Rebid Own Suit
Rebid
Simple rebid shows 6+ cards
Jump rebid shows 11-12 TP and 6+ cards
New Suit
Bid in second major would show 3+ cards and be forcing
Jump in second major would show 11-12 TP and 5+ cards in each major
Reverse shows biddable suit and is game forcing
2 NT
11-12 HCP
3 NT
14-21 HCP and partial stoppers in unbid suits
Responder Rebid After One of a Major-Opener Rebid Own Suit
Return to the Table of Contents Responder Rebid After 1 of a Major-2NT
Rebid
6+ cards
New Suit
New minor is forcing and shows 5 cards in responder’s major
Other major would show 4+ cards
Raise
4+ cards
4 Clubs (Gerber Convention)
Responder Rebid After Soloway Jump Shift-Raise
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New Suit
Splinter
3 NT
18-19 HCP
Continuing the Auction After One NT
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Opener Rebid After Conventions and Transfers
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Respond with the correct answer or transfer. See BBO GIB Conventions and Transfers.
Responder Rebid After Jacoby Transfer
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Raise
9 TP, 6+ cards
New suit
10+ TP and 4+ cards
Jump splinter and 15+ TP
2 NT
9 HCP, invitational to either game
Jump splinter and 15+ TP
3 NT
10-15 HCP
4 NT
18-19 HCP
Responder Rebid After Stayman
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Other major
9 HCP, 4+ cards
Raise
Simple 9 TP, 4+ cards
Jump 15+ TP, 4+ cards
New suit
Simple 14+ TP, 5+ cards
Splinter 15+ TP
2 NT
9 HCP, denies a four card major
4 NT
18-19 HCP
Overcalls by Opponents
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Effect on First Response to Partner
Return to the Table of Contents Effect on First Response to Partner
Turns off
Two over one bids
One round forces from opener
Cues and Doubles
Cue bid from responder 11+ TP and 3+ cards support, one round force
Negative double from responder over a one level overcall shows 6-12 TP and 4+ cards in each unbid suit
Raises
Simple 9-11 TP
Jump 6-8 HCP, 4+ cards
Preemptive 6-9 HCP 5+ cards
After opponent’s cue bid, 7-9 TP
New suit
11+ TP, 5+ cards
Effect on NT auction
If the opponents double, conventions and transfers remain on, but responder can redouble with 5 cards in a minor and preference to play in that minor.
If the opponents overcall 2 Clubs, double for Stayman. All other conventions and transfers remain on.
If the opponents overcall 2 Diamonds, Hearts, or Spades, all conventions and transfers turn off. Responder's bid of 2 Hearts or Spades is natural, promising 10+ HCP and 5+ cards. 2 NT is Lebensohl.
Effect on Opener Rebid
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After responder passes an opened major
15-22 TP, 6+ cards, rebid own suit at the two level
18-19 HCP, balanced hand, stop in opponent's suit, bid 2 NT
17-22 TP, biddable new suit, bid new suit at the three level
20-22 TP, 5+ cards in opening suit, bid opponent's, suit at the three level, one round force
20-22 TP, 6+ cards, rebid own suit at the three level
20-22 HCP, balanced hand, stop in opponent's suit, bid 3 NT
After responder redouble following an opponent double of a one NT opening
Bid 2 Clubs. Responder will pass with a club suit and bid 2 Diamonds with a diamond suit.
After responder double following an opponent overcall of a one NT opening
Bid 2 Hearts or Spades as dictated by Stayman.
After responder bid of 2 Hearts or Spades following an opponent overcall of a one NT opening
Respond naturally
After responder bid of 2 NT following an opponent overcall of a one NT opening (Lebensohl Convention)
Bid 3 Clubs. Responder's redids at the 3 level will reflect Stayman.
Overcalls by Partnership
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Overcalling Opponent’s Opening Bid
Return to the Table of Contents Overcalling Opponent’s Opening Bid
Doubles
Takeout double shows a doubleton or less in opener suit, 12+ TP, 3+ cards in unbid suits (third or fourth seat 16+ TP)
Cue Bid (Michaels)
Over minor shows two 5+ card majors
Over major shows other 5+ card major and one 5+ card minor
Suit bid over suit open
One level or two level in a lower suit overcall 8-17 HCP, 9-19 TP, 5+ cards
Jump 4-9 HCP, 6+ cards
Double jump fewer than 10 HCP, 7+ cards
Cappelletti over NT open
Double for penalty, 16+ HCP
2 Clubs, 10-14 TP, 6+ cards in a one suited hand
2 Diamonds, 10-14 TP, 5+ cards in each major
2 Hearts, 10-14 TP, 4+ cards in hearts, 5+ cards in one minor
2 Spades, 10-14 TP, 4+ cards in spades, 5+ cards in one minor
2 NT, 10-14 TP, 5+ cards in each minor
Jump in a suit over NT open
Natural bid, 14-16 TP, strong rebiddable suit
Double jump in a suit over NT open
Fewer than 10 HCP, 7+ cards
NT bid
One level NT overcall 15-18 HCP, balanced hand and stopper in opponent suit bid
Two level NT overcall is “Unusual 2 NT” 12+ TP, 5+ cards in the next two lower unbid suits
Three level NT 25+ HCP, balanced hand
Responding to Partner’s Overcall
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Doubles
Re-double of an opponent’s double 16+ TP and a lack of support for partner’s suit
Responding to Michaels Cue Bid Showing Both Majors
Bid the number of trumps in the best major
3 Clubs in response to 2 Clubs, 14+ TP, 3+ cards in each major
3 Hearts in response to 2 Clubs, 8-12 TP, 3+ in that suit
4 of a major in response to 2 Clubs, 7-12 TP, 4+ in that major
Cue bid of Opponent's Suit
Simple raise of opponent’s opening suit 10-12 TP, 3+ cards for partner (12-16 TP in fourth seat)
Raise
Simple raise of partner’s suit 8-10 TP, 3+ cards, (8-11 TP in fourth seat)
Responding to Cappelletti
Pass the double
Pass if you have 6+ cards in the suit overcalled
Pass in response to 2 Spades or Hearts if you have two of that suit
2 Diamonds in response to 2 Clubs is a relay asking partner to bid their suit
2 Hearts or Spades in response to 2 Clubs shows 6+ cards in that suit
2 NT in response to 2 Clubs is natural and a one round force.
2 Hearts or Spades in response to 2 Diamonds shows 5+ cards in that suit
2 Spades in response to 2 Hearts shows 6+ cards in that suit
3 Clubs or Diamonds in response to 2 Hearts shows 6+ cards in that suit
3 Hearts in response to 2 Hearts is a natural raise
3 Clubs, Diamonds, or Hearts in response to 2 Spades shows 6+ cards in that suit
2 NT in response to 2 Diamonds, Hearts, or Spades is a relay asking partner to bid their suit and a one round force.
3 Clubs or Diamonds in response to 2 NT is a NT evasion.
3 Hearts or Spades in response to 2 NT shows 6+ cards in that suit
3 NT in response to 2 NT is natural, asking partner to play game at 3 NT.
New suit
New suit at the required level 9+ TP, biddable suit (11-15 TP in fourth seat)
Jump in new suit 14+ TP, biddable suit, game forcing (16+ TP, re-biddable suit in fourth seat)
NT bid
2 NT 11-13 HCP, balanced hand, likely stopper in opponent’s opening suit (14-16 HCP, and likely stoppers in unbid suits in fourth seat)
3 NT 15-22 HCP, balanced hand, likely stopper in opponent’s opening suit (17-20 HCP, and likely stoppers in unbid suits in fourth seat)
BBO GIB Conventions and Transfers
Return to the Table of Contents BBO GIB Conventions and Transfers
Return to Responding to a One NT Opening
Return to Continuing the Auction After One NT
After One NT Opening
Return to the Table of Contents After One NT Opening
Stayman Convention
Asking partner to confirm or deny a four card major
Stayman Convention (Minor)
Asking partner to confirm or deny a four card minor
Transfer
Forcing partner to bid in next highest suit
Jacoby Transfer
Diamonds for hearts, hearts for spades
Texas Transfer
Transfer with 6+ cards
Slam Bidding
Return to the Table of Contents Slam Bidding
Gerber Convention
4 Clubs after a NT opening is a call for Aces, responses are:
4 Diamonds is 0 or 4
4 Hearts is 1
4 Spades is 2
4 NT is 3
Roman Keycard Blackwood
4 NT after a suit opening asks for Aces and the King of the trump suit, responses are:
5 Clubs is 0 or 3 keycards
5 Diamonds is 1 or 4 keycards
5 Hearts is 2 or 5 keycards, but no Queen
5 Spades is 2 or 5 keycards plus Queen