BBO Advanced (2/1=GF) Doubles Notrump Overcalls Negative->4 ♦ , Responsive->4 ♦ , Support x and xx ->2-level, Maximal 1NT=15-18 (system on) 2NT=unusual (2 lowest unbid) Simple Overcalls Over 1NT Openings 8-16+ HCP; new suit=non- forcing; jump raise=weak; cuebid=limit raise+ DBL=penalty 1NT=strong (Cappelletti): 2 ♣ =any suit, 2 ♦ =majors, 2 ♥ = ♥ +minor, 2 ♠ = ♠ +minor 1NT=weak (Landy): 2 ♣ =majors, 2 ♦ / ♥ / ♠ =natural Jump Overcalls Over Takeout Doubles Weak New suit forcing at 1-level; RDBL=10+ HCP; 2NT=limit raise+; jump raise=weak; jump shift=weak; Direct Cuebid Slam Bidding Michaels RKCB 1430; Gerber; Grand slam force; DOPI; DEPO Defensive Carding Attitude: high=encouraging; low=discouraging Count: high- low=even; low-high=odd; 4th best leads; Ace from AKx versus suits System Summary BBO Advanced (2/1=Game Force) Notrump Openings 1NT=15-17: Stayman, Jacoby, 2 ♠ ->3 ♣ , 2 ♠ ->3 ♣ , 2NT->3 ♦ , 3 ♣ =5-5 minors weak, 3 ♦ =5-5 minors GF, 3 ♥ =31(54), 3 ♠ =13(54), Gerber, Texas 2NT=20-21: Stayman, Jacoby, Texas, Gerber, 3 ♠ ->3NT (minor 1 or 2-suiter) 3NT=Solid minor no outside A/K Major Suit Openings Minor Suit Openings 1 ♥ / ♠ =5+: 1NT=forcing, Jacoby 2NT, 3NT=15-17, Splinters, Weak jump raises, 3 ♣ =limit raise (4+), 3 ♦ =good raise (4+), 1 ♠ -3 ♥ =weak 1 ♣ / ♦ =3+, 2NT=11-12; 3NT=13-15, 1 ♣ -1NT=8-10, Inverted raises, 1 ♦ -3 ♣ =invitational 2-Level Openings 2 ♣ =strong: 2 ♦ =waiting, 2 ♥ =negative, 2NT= ♥ positive 2 ♦ / ♥ / ♠ =weak: 2NT=asks feature; new suits forcing Other important notes 4th suit game force, Unusual vs. Unusual, Ingberman over reverses (2NT=negative), 2-way NMF, Wolff over 2NT rebids