1C/D (m): Natural, best minor

• 2C over 1D : 4+ suit, forcing for one round
  
• 3NT: 15-17 HCP, 4441
• 2NT: non forcing, stoppers in the majors
• 2H/S/3C: 5-4, game forcing (may be a bit less than a reverse)
• 3H/S: Splinter. Fit in clubs
• 3D: 6+ good suit, at least a good opening hand (less than a reverse)
• 2D: Otherwise (may have 3 small diamonds in the worst case)
• 1D: Forcing for one round, 3+ suit
  
• 1M: Forcing for one round, 4+ suit
• 1NT: 12-14HCP, balanced
• 2C: Checkback
• 2M: fit
• 2H after 1S: 3 spades and 4 hearts
• 2D: otherwise
  
• 2NT: 18-19HCP, balanced
• 3C: Wolf Sign Off
• 3D: relay
  
• Pass
  
• Repeat own suit: Sign-off
• 1m-1S-2NT-3C-3D-3H: 5-5, sign-off
• 1m-1H-2NT-3C-3D-3S: Looking for 4 spades, game only (usually 4-4 in majors)
• Jump in a new suit: freak hand, game only
• 3NT: Mild slam try in clubs
• Other: Natural, typically strong
  
• 3NT: to play, usually with a long openning suit
• 3C over 1D or 2D over 1C: Strong
• 2M: Strong
• Other Jump Shifts: pre-empt
• 1NT: 8-10 HCP over 1C; 6-10 HCP over 1D
  • 2NT: Values for 3NT, short in the other minor
• 2NT: Invitation to 3NT
  

Responses after opponent’s Takeout DBL

• 1NT: To play
• 2NT: 5+ fit limit or stronger, round forcing
• 1/1: Natural, forcing
• 2/1: Natural, non-forcing
• RDBL: 9+ HCP, does not deny 4-card fit
• Jump shifts: Weak

Responses after opponent's natural over-call

• 1NT: Stopper, limit
• 2NT: 5+ fit limit or stronger, round forcing
• DBL: Negative up to 4H
• New suit: Natural, round-forcing
  
• Cue-bid: Asking for a stopper or 4+ fit, limit+
• Jump cue-bid: Splinter
• Jump shifts: Weak
  

Responses by passed hand

• Jump shift: Good suit and fit in opener's suit