Defense against pre-emptive openings

Natural 3C/D

• DBL: Take-out
• 3NT: To play
• New suit: Natural
• 4NT: BW for 4 Aces
• 4D: Both majors
• 4C over 3C: Diamonds and a major
• 4H/S: To play

Natural 3H/S

• DBL: Take-out
• 3NT: To play
• New suit: Natural
• 4NT: Both minors
• Cue-bid: Michaels

Natural 4C/D

• DBL: Take-out
• 4NT: Classic BW for 4 Aces
• New suit: Natural
• Cue-bid: Powerful 2-suiter
• New suit jump: Invitation to slam

Natural 4H/S

• DBL: Take-out, but with some defensive values
• 4S: To play
• 4NT: Takeout
• New suit: Natural
• Cue-bid: Powerful 2-suiter

Natural 5C/D

• DBL: Optional
• 5NT: Takeout
• New suit: Natural
• Cue-bid: Powerful 2-suiter

Against 4C/D constructive pre-empts in Hearts/Spades (Namyatz)

• Pass followed by DBL: Business
• DBL: Balanced
• 4H/S: Takeout
• 4NT: The minors
• New suit: 6+ suit

Against other transfer pre-empts

• DBL: Balanced opening hand or any 19+
• Pass followed by DBL: Business
• Cue-bid: Take-out
• NT: 16-18 HCP, balanced
• Pass followed by NT: To play
• New suit: 5+ suit
• Jump to NT over a major suit pre-empt: Both minors
• Jump cue-bid below 3NT: asks for a stopper. Same continuation as after Jump Cuebid over opponents' natural opening (see "Defense against Natural openings).