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Software by Bridge Base Online, LLC. SPECIAL DOUBLES NOTRUMP OVERCALLS NAMESMolly Harris and Sue Kroning After Overcall: Penalty Direct: 15 to 18 Systems on GENERAL APPROACH Negative thru3S Conv. 2/1 Game forcing Responsive: thru2S Maximal Balance: 11 to 14 Two Over One: Game Forcing Game Forcing Except When Suit Rebid Support: Dbl thru2H Rdbl Jump to 2NT: Minors 2 Lowest VERY LIGHT: Openings 3rd Hand Overcalls Preempts Card-showing Min. Offshape T/O Conv.sys OFF/bal NT FORCING OPENING: 1♣ 2♣ Natural 2 Bids Other Take out through 4H DEFENSE VS NOTRUMP NOTRUMP OPENING BIDS SIMPLE OVERCALL vs: Strong 1NT Weak 1NT 1NT 3♣ inv 2NT 20 to 21 1-level 7 to 17 HCP (usually) 2♣ D or maj/min Clubs 15 to 17 3♦ inv Puppet Stayman Often 4 cards Very light style 2♦ Majors Diamonds Responses 2♥ 6+ Hearts Hearts to 3♥ 5 H 16+ Transfer Responses: New Suit: Forcing NFConst NF 2♠ 6+ Spades Spades 5-Card Major Common 3♠ 5 S 16+ Jacoby Texas Jump Raise: Forcing Inv. Weak Dbl Equal Hand Good 14+ System On OverDbl, 2C 3♠ MSS (GF) Cuebid shows limit raise+ Other: sys on/x of 1NT 2♣ Stayman Puppet Texas on thru 4C JUMP OVERCALL 2♦ Transfer to ♥ 4♦, 4♥ Transfer 3NT to Strong Intermediate Weak OVER OPP'S T/O DOUBLE Forcing Stayman Smolen New Suit Forcing: 1-level 2-level 2♥ Transfer to ♠ Lebensohl ( fast denies) Conventional NT Openings OPENING PREEMPTS Redouble implies no fit 2♠ Relay to 3C weak Negative Double Gambling 3NT Sound Light Very Light 2NT Over Limit + Limit Weak 2NTinv 3/4-bids Majors Conv./Resp.rule of 2-3-4 Minors MAJOR OPENING MINOR OPENING Expected Min. Length 4 5 Expected Min. Length 4 3 NF 0-2 Conv. DIRECT CUEBID Other: Weak jump raise 1st/2nd 1♣ Over: Minor Major VS OPENING PREEMPT DOUBLE IS Natural Takeout thru4H Penalty 3rd/4th 1♦ Strong T/O Conv. Takeout: RESPONSES RESPONSES Michaels Lebensohl 2NT Response Double Raise: Force Inv. Weak Double Raise: Force Inv. Weak Natural if 2 suits have been bid Other: 2NT Overcall = 16-19 HCP After Overcall: Force Inv. Weak After Overcall: Force Inv. Weak Conv. Raise: 2NT 3NT Splinter Forcing Raise: J/S in other minor SLAM CONVENTIONS Gerber 4NT: Blackwood RKC 1430 Other: Jacoby 2NT Single raise Other: Inverted minors RKC 1430, Q ask, Gerber if 1st or last bid is NT 1NT: Forcing Semi-forcing Frequently bypass 4+♦ Regular Gerber unless transfer auction. 2NT: Forcing Inv. to 1NT/1♣:6 to10 vs. Interference: DOPI DEPO Level:5 ROPI 3NT:13 to15 2NT: Forcing Inv. 11 to12 LEADS (click card led, if not in bold) DEFENSIVE CARDING Drury : Reverse 2-Way Fit 3NT:13 to15 versus Suits versus Notrump vs Suits vs NT Other: Other: x x x x x x x x x x x x Standard: x x x x x x x x x x x x x x x x Except DESCRIBE RESPONSES/REBIDS A K x 10 9 x A K J x A Q J x 2♣22+ to HCP Or 8.5+ tricks weak rbd cheapest minr K Q x K J 10 x A J 10 9 A 10 9 8 Upside-Down Count Strong Other 2nt 22-24, 3NT 25-27 Q J x K 10 9 x K Q J x K Q 10 9 Upside-Down Attitude 2♦ Response: Neg Waiting Ace or king J 10 x Q 10 9 x Q J 10 x Q 10 9 8 FIRST DISCARD 2♦ 5 to 11 HCP Normally good 6-card suit RONF; 2NT is OGUST K Q 10 9 J 10 9 x 10 9 8 x Lavinthal Natural: Weak Intermediate Strong Conv 2NT Force New Suit NF Length Leads: Odd/Even 2♥5 to 11 HCP Normally good 6-card suit RONF; 2NT is OGUST 4th Best vs Suits vs NT Natural: Weak Intermediate Strong Conv 2NT Force New Suit NF 3rd/5th Best vs Suits vs NT OTHER CARDING 2♠ 5 to 11 HCP Normally good 6-card suit RONF; 2NT is OGUST Attitude vs NT Smith Echo Natural: Weak Intermediate Strong Conv 2NT Force New Suit NF Primary signal to partner's leads Trump Suit Pref. Attitude Count Suit Preference Foster Echo OTHER CONV CALLS: New Minor Forcing 2-Way NMF Weak jump shifts: In Comp. Not In Comp. SPECIAL CARDING PLEASE ASK 4th Suit Forcing: 1 Round To Game Software by Bridge Base Online, LLC. - www.bridgebase.com.
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