Defense against special openings

Multi 2D (Weak 2 in a major or strong hand) OR

Wilkosz 2D (5+5+ with at least one major suit) OR

Flannery 2D (45xx) OR Precision 2D (4414/4405) OR

Ekren 2D (4+4+ in majors)

• 2^nd seat
• DBL: An opening bid in one of the majors (good 4+ suit) OR 18+HCP
• 2H: 15-19 balanced with values in both majors. Natural suites (no transfers, no Stayman).
• 2S/NT: Transfer to clubs/diamonds. Acceptance of transfer is weakest bid by partner.
• 3C/D: 6+ suit, competitive
• 3H/S: Asking for a stopper
• 3NT: to play
• 4^th seat if partner (in 2^nd seat) Passed
• DBL of 2/3/4H: Takeout. If opponent passes, partner's 2NT is Lebensohl (with weak hand)
• DBL of 2S: 4+ suit
• NT: Strong, balanced. All bids by partner are transfers.
• Other: Natural
• 2D-DBL-Pass
• Pass: Business. Frequently used even with relatively poor diamond holdings.
• New suit: Natural, non-forcing
• 2NT: Invitation, stopper
• 3D: Strong, short in diamonds
• 4^th seat if partner (in 2^nd seat) DBLed and 3^rd seat did NOT pass
• DBL: 4+ suit
• New suit: Natural, forcing
• 2NT: Lebensohl
• 6^th & 8^th seat
• DBL: Takeout, usually balanced without a stopper in one of the majors
• 2NT: Takeout with both minors
• Other: Natural

Weak 2 OR

Dutch 2H/S (5+4+ in hearts/spades and a minor suit)

• DBL: Takeout. If opponent passes:
• 2NT (Lebensohl): Relay to 3C usually with a weak hand
• New suit: Natural, 8+ HCP
• Cue-bid: No stopper, 4 cards in other major
• 3NT: No stopper, 3 or fewer cards in other major
• Suit: Natural
• 2NT: Strong, balanced. All bids by responder are transfers.
• Cue-bid: Asking for stopper. Same developments as after 1H/S-3H/S cue-bid
• Jump cue-bid: 5+5+ in minors, control in the opening suit
• 4NT: 5+5+ in minors, no control in the opening suit
• 4C/D: 5+ clubs/diamonds and 5+ in the other major

2NT with both minors

• DBL: 15+ HCP, balanced or semi-balanced
• 3C: Hearts
• 3D: Spades
• 3H/S: Competitive
• 3NT: Strong balanced

Flannery 2H (45xx) OR

Ekren 2C/D/H/S (4+4+ in the opening suit and another suit)

• DBL: Optional
• Suit: Natural
• 2NT: Strong NT, follow all transfers
• Lower (if known) cue-bid: Natural – to play
• Higher (or only) cue-bid: Game Forcing