############ Acol/Forum D Bidding System - (BBO) - Cheat Sheet / Schummelzettel ################
====================================== Opening =================================================
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+----> {1 Minor} : 3+ Minor, 11-21 HCP : ###> "Suit Opening" [natural]
+----> {1 Major} : 5+ Major, 11-21 HCP : ###> "Suit Opening" [natural]
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+----> {2 Suit} : 6 Suit, 5-11 HCP ###> Weak Two (Except: 2 ♣) [limitation]
+----> {3 Suit} : 7+ Suit, 6-11 HCP ###> Barrage [limitation]
+----> {4 Suit} : Very strong in Suit [invitation]
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+----> {1 NT} : 2-5 ♣, ♦, ♥ and ♠, 15-17 HCP ###> "NT Opening" [natural]
+----> {2 NT} : 2-5 ♣, ♦, ♥ and ♠, 20-21 HCP ###> "NT Opening" [natural]
+----> {2 ♣} : 19+ HCP, 23+, Forcing to 2 NT ###> Strong Two Clubs [invitation]
================================ Suit Opening Response =========================================
|
+--+-> {2 ♣}
| +----> {2 ♦} ###> Waiting Bid for more info [invitation]
+--+-> {2 Suit} : Preemptive, 6 Suit, partner should pass
| +----> {2 ♦} ###> "Waiting for more infos [invitation]
| +====> {Double} => {2 NT}: Lebensohl -> Forcing 3 ♣ [invitation]
|
+---> {3+ Suit} : Preemptive, long suit, partner should pass
|
+--+--> {1 Minor}
| +----> {3 Minor} : 5+ Minor, -11 HCP ###> "Limit Raise" [limitation]
| +----> {2 Minor2} : 9-20 HCP ###> "Inverted Minors" [invitation]
| +----> {3 Minor2} : 9-20 HCP ###> "Inverted Minors" [invitation]
| |
| +--+--> {1 Major}
| +--+--> {1 (2) NT}
| +----> {2 (3) Minor2} : 5+ Major, -11 HCP, 7+ ###> "New Minor Forcing" [invitation]
|
+--+--> {1 Major}
| +----> {2 Major} : 4+ Other Major/One Minor ###> "Michaels" [invitation]
| +----> {++ Major} : 4+ Major, -11 HCP ###> "Limit Raise" [limitation]
| +--+--> {1 NT} : 6-12 HCP ###> "Forcing Notrump" [invitation]
| | +====> {+ Major} : 5+ Other Major, 9+ ###> "Michaels" [invitation]
| +-----> {2 NT} : 4+ Major, 12+ HCP ###> "Jacoby 2 NT" [investigation]
|
+--+--> {1 Suit}
+----> {+++ Suit2} : 4+ Suit, -1 Suit2 ###> "Splinter" [Investigation]
+----> {Double} : -2 Suit, 12+ ###> "Takeout Double" [Investigation]
+----> {no-jump 2 Suit2} : 12+ HCP ###> "2/1 Game Forcing" [invitation]
+----> {2 Suit2} : -3 Suit/Suit2, 4+ Other suits ###> "Two Suits Takeout" [Investigation]
+----> {1 NT} : 15+ HCP ###> Artificial Force [invitation]
+----> {2 NT} : 15+ HCP ###> Artificial Force [invitation]
+----> {4 NT} : -11 HCP, 8-12 ###> "Blackwood" [investigation]
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+----> {1 Suit2} : 4+ Suit, 6+ ###> One over one [natural]
+----> {2 Suit2} : biddable Suit2, 14+ ###> Two over one [natural]
|
+--+--> {Suit2}
+==+==> {Double}
| +====> {2 NT} : ###> Lebensohl, Forcing 3 ♣ [invitation]
|
+--+--> {Suit3}
+----> {Suit4} : -3 Suit4, 10+ ###> "Fourth Suit Forcing" [Investigation]
================================ Suit Opening Overcalls ========================================
|
+--+--> {1 Minor}
| +====> {2 Minor} : 4+ Both Majors ###> "Michaels" [invitation]
| +====> {2 NT} : 5+ Majors, -3 Minors, 12+ ###> Unusual NT [invitation]
|
+--+--> {1 Major}
| +====> {2 NT} : 5+ Minors, 15+ ###> Unusual NT [invitation]
|
+--+--> {1 Suit}
+==+==> {+/++ Suit2} : 5+ Suit1, 11+ ###> Overcall [invitation]
| +====> {Double} : -3 Suit1,Suit2, 4+ other suits, 12+ ###> "Negative Double"[invitation]
| +----> {2 Suit1} : 3+ Suit2, 10+ ###> Good Support [invitation]
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+====> {++ Suit} : 6 Suit, 5-11 HCP ###> "Preemptive Jump Call" (Weak Two) [limitation]
+====> {+++ Suit} : 7+ Suit, 6-11 HCP ###> "Preemptive Jump Call" (Barrage) [limitation]
+====> {Double} : -2 Suit, 12+ ###> "Takeout Double" [Investigation]
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+====> {1 NT} : 15+ HCP, 18+ ###> No Trump Overcall [natural]
+====> {3 NT} : 5- Majors, stop Suit, 25+ [natural]
+====> {2 Minor} : 5+ Suit, 11+ ###> Two Level Overcall [natural]
|
+--+--> {...}
| +--+--> {2 Suit}
| +====> {Double} : 4+ all other suits, 8+ ###> "Responsive Double" [invitation]
|
+--+--> {Suit}
+--+--> {Suit}
#====> {New Suit} : 17- HCP, 19+ ###> "BBO Cue Bid" [Investigation]
================================ NT Opening Response ===========================================
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+--+--> {2 NT} ###> indicates strong hands, responses are mostly 1 more higher bids than 1 NT)
| +----> {3 Suit} : 7+ Suit, 9- HCP, 6+ ###> Preemptive [limitation]
| +----> {4 ♦/♥} : 6+ ♥/♠ ###> "Texas Transfer" [invitation]
| +----> {2 ♣} : -11 HCP, -12 ###> "Stayman" [investigation]
| +----> {2 ♠} : 4+ ♣♦, 5+ ###> "Minor Stayman" [investigation]
|
+--+--> {1 NT} : -11 HCP, -12
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+----> {2 ♣} : -11 HCP, -12 ###> "Stayman" [investigation]
+----> {2 ♠} : 4+ Minors, 10+ ###> "Minor Stayman" [investigation]
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+----> {2 ♦/♥} : 5+ ♥/♠, -12 ###> "Transfer (Jacoby)" [invitation]
+----> {2 NT} : 6+ ♣ ###> "Minor Transfer" [invitation]
+----> {3 ♣} : 6+ ♦ ###> "Minor Transfer" [invitation]
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+----> {3 Suit} : -1 Suit, 4+ Other Suits, 12+ ###> "Splinter" [invitation]
+----> {3 NT} : 2-5 All Suits, 10-13 [invitation]
+----> {4 ♣} ###> "Gerber"2 [invitation]
+----> {4 ♦/♥} : 6+ ♥/♠ ###> "Texas Transfer" [invitation]
================================ NT Opening Overcalls ==========================================
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+----> {2+ NT} ###> indicates strong hands, responses are analogous more higher bids than 1 NT
|
+--+==> {1 NT}
+====> {2 ♣} : -14 HCP, 10+ ###> "Cappelletti", Single Suited [investigation]
+====> {2 ♦} : 5+ Majors, 1++ ###> "Cappelletti", Majors [investigation]
+====> {2 ♥} : 4+ ♥, -3 ♠, 11+ ###> "Cappelletti", ♥ and a Minor [investigation]
+====> {2 ♠} : -3 ♥, 4+ ♠, 11+ ###> "Cappelletti", ♠ and a Minor [investigation]
+====> {2 NT} : 5+ Minors, 15+ ###> "Cappelletti", Minors [investigation]
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+====> {3 Suit} : strong biddable Suit, 13+ [invitation]
+====> {3 NT} : -5 Majors, Stops in all suits, 25+ HCP [invitation]
+====> {4 Suit} : 7+ Suit, -11 HCP, 3+ [limitation]
================================ Strong Two Clubs =============================================
|
+--+--> {2 ♣}
+====> {Double} : 6 +HCP, biddable ♣ [invitation]
+====> {+ Suit} : 9+ [invitation]
+====> {++ Suit} : 7+ Suit, 6-13 ♣ [limitation]
|
+----> {2 ♦} ###> Waiting for more Info [invitation]
================================ Anytime in bidding ============================================
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+--+--> {...}
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+--+--> {Minor} -> {++Minor} : 5+ Minor, -11 HCP ###> "Limit Raise" [limitation]
| |
| +--+--> {...}
| +----> {Minor} : 4- ###> "Cheaper Minor" [limitation]
|
+----> {Major} -> {++Major} : 4+ Major, -11 HCP ###> "Limit Raise" [limitation]
|
+--+--> {Suit}
| +==+===> {1 Suit2}
| | +====> {Double} : 3+ Suit1, 11+ ###> Support Double [invitation]
| +----> {4 NT} : -11 HCP, 8-12 ###> "Blackwood" [investigation]
| +----> {++ Suit} : 6+ Suit ###> "Jump Rebid" [invitation]
| +----> {++ Suit2} : 5+ Suit1, biddable Suit2, 20+ ###> "Jump Shift" [invitation]
| |
| +--+--> {...}
| +--+--> {Suit} : -11 HCP, 8-12 ###> "Cue" [investigation]
| +----> {4 NT}
|
+==+==> {1 NT}
+----> {2+ ♦/♥} : 5+ ♥/♠ ###> "Transfer (Jacoby)" [investigation]
======================================= Notation ===============================================
| |
+--+--> {Bid1} | Bid: {Count Suit/NT} : Conditions for bidding this [reason]
+----> Reply1 | Suit: Minor: ♣ or ♦, Major: ♥ or ♠, Suit: Any of ♣♦♥♠
| | Reply: {Bid} : Conditions ###> explanation/"link" [reason]
+--+--> {Bid2} | Bid -> Partners response | Counts: n-m : From n to m
+====> Reply2 | Bid => Opponents overcall | n+ : minimum n -n : maximum n
E.g: --+--> {1 NT} ( ----> response from partner; opponents overcall would be ====> )
+----> {2 ♣} : -11 HCP, -12 ###> "Stayman" [investigation]