SPECIAL DOUBLES NOTRUMP OVERCALLS After Overcall: Penalty Direct: 15 to 18 Systems on NAMES Billy Cohen-Ron Smith Negative thru 4♥ Conv. system on GENERAL APPROACH Responsive : thru 4♥ Maximal Balancing: 11 to 16 Jump to 2NT: Minors 2 Lowest Support: Dbl. thru Redbl Two Over One: Game Forcing Game Forcing ExceptWhen Suit Rebid Conv. Card-showing Min. Offshape T/O VERY LIGHT: Openings 3rd Hand Overcalls Preempts Snapdragon DEFENSE VS NOTRUMP FORCING OPENING: 1♣ 2♣ Natural 2 Bids Other vs: 2nd seat 4th seat PH SIMPLE OVERCALL NOTRUMP OPENING BIDS 2♣ Majors ♣+major 1NT 2NT 20 to 21 1 level 6+ to HCP (usually) 2♦ >♥ ♦+major 15 to 17 vul 3♣ Strong Puppet Stayman often 4 cards very light style 2♥ >♠ Natural Transfer Responses: 14 to 16 nv 3♦ Strong Responses 2♠ 4♠+longer m Natural Jacoby Texas 5-card Major common 3♥ short 3-1-5-4 New Suit: Forcing NFConst NF 3 Dbl: Good hand 1m or both M 3♠ short 1-3-4-5 ♠ MSS Jump Raise: Forcing Inv. Weak Other2N=4♥+ longer minor System on over X,2♣ Jump Q= Mixed raise 2♣ Stayman Puppet 2♦ Transfer to ♥ 4♦, 4♥ Transfer 3NT 25 to 27 JUMP OVERCALL OVER OPP'S T/O DOUBLE Forcing Stayman Smolen Strong Intermediate Weak New Suit Forcing:1 level 2 level 2♥ Transfer to ♠ Lebensohl (xfer denies) Conventional NT Openings Jump Shift:Forcing Inv. Weak 2♠ MSS or ♦ bust Neg. Double : Redouble implies no fit 2NT Xfer>♣ Other: OPENING PREEMPTS 2NT Over Limit+ Limit Weak Sound Light Very Light MAJOR OPENING MINOR OPENING Majors NF 3/4-bids Minors Expected Min. Length 4 5 Expected Min. Length 4 3 0–2 Conv. Conv./Resp. Other 1st/2nd 1♣ 3rd/4th 1♦ DIRECT CUEBID VS Opening Preempts Double Is RESPONSES RESPONSES OVER: Minor Major Takeout thru 4♥ Penalty Natural Double Raise: Force Inv. Weak Double Raise: Force Inv. Weak Conv. Takeout: Strong T/O After Overcall: Force Inv. Weak After Overcall: Force Inv. Weak Lebensohl 2NT Response Michaels Conv. Raise: 2NT 3NT Splinter Forcing Raise: J/S in other minor Other: Other: 3♣= limit raise; Double raise=MixSingle raise Other: SLAM CONVENTIONS Gerber : 4NT: Blackwood RKC 1430 1NT: Forcing Semi-forcing Frequently bypass 4+♦ Optional RKC 2NT: Forcing Inv. to 1NT/1♣ 6 to 10 3NT: to 2NT Forcing Inv. 12+ to 15 vs Interference: DOPI DEPO Level: ROPI 5 of our suit starts depo Drury : Reverse 2-Way Fit 3NT: 16 to 18 1♠-3N;1♥-3♠ =10-12 splinter Other Dbl raise=mixed 1??/??-2??=11-12 LEADS (circle card led, if not in bold) DEFENSIVE CARDING Other: dutch spiral versus Suits versus Notrump vs SUITS vs NT Standard: DESCRIBE RESPONSES/REBIDS x x x x x x x x x x x x Except to HCP x x x x x x x x x x x x x x x x 2♣ Strong Other Cheaper Minor+2nd neg A K x T 9 x A K J x A Q J x 2♦ Resp: Neg Waiting Q x K T x A T 9 A 9 x K J J T Upside-Down: 5 to 11 HCP feature Q J x K T 9 x K Q J x K Q T 9 2♦ count Natural: Weak Intermediate Strong Conv. 2NT Force New Suit NF J T 9 Q T 9 x Q J T x Q T 9 x attitude 5 to 11 HCP feature K Q T 9 J T 9 x T 9 x x 2♥ FIRST DISCARD Natural: Weak Intermediate Strong Conv. 2NT Force New Suit NF LENGTH LEADS: Lavinthal 5 to 11 HCP feature 4th Best vs SUITS vs NT Odd/Even 2♠ Natural: Weak Intermediate Strong Conv. 2NT Force New Suit NF 3rd/5th Best vs SUITS vs NT Rusinow leads versus no-trumpAttitude vs NT OTHER CARDING OTHER CONV. CALLS: New Minor Forcing: 2-Way NMF Smith Echo Weak Jump Shifts: In Comp. Not in Comp. Primary signal to partner's leads Trump Suit Pref. 4th Suit Forcing: 1 Rd. Game 1♣-1♦-1♥-1♠ =4th suit forcing Attitude Count Suit preference Foster Echo Fit showing jumps wolff sign off SPECIAL CARDING PLEASE ASK Unusual versus Unusual. Pass hand jumps fit showing Last modified: Jul 16 2021 15:43.