1H/S (M): Natural, 5+ cards suit

• Raises
• 3/4M: Pre-empt
• 2S over 1H: Limit raise
• 3H over 1S: Limit raise
• 2M: 3+ fit, constructive raise (If weaker responder bids 1S/NT and gives preference later)
• New suit in other major: 4+ cards
• 2NT: Game try, often without a short suit
• 3C/D: Game try with another short suit unless a concentrated 5-4
• Splinter (requires exactly 3 or 4 controls) - the opener may bid a new suit to ask for singleton in that suit. Responder would return to 4M if negative and would cuebid or jump-raise otherwise.
• 3NT: 4-card fit and 3 or 4 Controls
• 4C: 5-card fit and singleton in a minor
• 4D: 5-card fit and singleton in the other major
• 2NT: Forcing till 4M, 4+ fit, balanced or semi-balanced
  
• 4M: Sign-off
  
• 3M: Minimum with a singleton
• New suit: Natural, good hand
  
• Reverse or a jump in a new suit: Minimum with 5+5+
• 3NT: Good hand, otherwise
  
• Shifts
• 3S over 1H: To play
• 4H over 1S: To play
• 4S over 1H: To play
• 3C/D: 9+ HCP, 6+ good suit, non-forcing
• 2/1 Shifts: 4+ suit (5+ hearts), game forcing
  • 3NT: 15-17 HCP, 5332, stoppers
  • 2NT (Mini-Max): All other 5332 with stoppers
  • Raise: 4+ fit (3+ hearts), good hand. Note: No Fast Arrival
  • Double raise of a minor: Fit, slam interest
  • Double raise of hearts: 15-17
  • New suit: 3+ suit (4+ hearts/spades)
  • Double shift: Splinter
  • Double re-bid (3M): 6+ hearts/spades, good hand, good suit
  • Re-bid (2M): Otherwise
• 1NT over 1H: 5+ spades, round forcing
  • 2C: 3+ suit
  • 2D: 4+ suit
  • 2H: 6+ hearts
  • 2S: 3+ fit, minimum
  • 2NT: 17-19 HCP, 2533, stoppers. 3C by responder is Wolf sign-off.
  • 3C/D: 3+ suit, game forcing
  • 3H: 6+ hearts, limit
  • 3S: 3+ fit, limit
  • 3NT: 3+ fit, strongest possible bid
  • 4C/D: 4+ fit, Splinter
  • 4H: To play
  • 4S: 4522
• 1S/NT: Round forcing
• 1NT: 4 cards in spades
• 2C: Min with any 5332 or 4+ clubs
• Pass
• 2D: 9+ HCP
• 2H after 1H opening: Min, 5 hearts
• 2S after 1H opening: Max, 3514
• 2H after 1S opening: Min, 2 or 3 hearts, 5 spades
• 2S after 1S opening: Min, 0 or 1 heart, 5 spades
• 2NT: Max, balanced or semi-balanced
• 3C: Max, 5+4+
• 3D: Max, 5134/1534
• 3M': Max, 5314/3514
• 3M: Max, 6+ suit
• 2M: Preference with 2+ cards
• 2H after 1S opening: 6+ hearts, sign off
• 2S after 1H opening: Limit, club fit
• 2NT: Limit, short in M
• 3C: Limit, 6+ clubs
• 3D: 6+ diamonds, sign off
• 3H/S: Limit, 3-card fit, no short suit
• 3H after 1S opening: Limit, good 6+ hearts
• 3S after 1H opening: Game, club fit, no heart fit
• 3NT: 12-15 HCP, balanced, may have 3 cards in M
• 4C/D: 7+ clubs/diamonds, freak distribution
• 4H after 1S opening: To play. How is this different from direct 4H bid?
• Other shift: 4+ suit, non-forcing
• 2M: 6+ suit
• 2NT: 17-19 HCP, 5332. Next suit bid by responder is a transfer; 3NT is to play.
• Jump or reverse shift: 3+ suit (4+ if hearts or spades), game-forcing
• 3M: 6+ suit, good hand, good suit
• 3NT: To play

Responses after opponent’s Takeout DBL

• Raises: Preemptive
• 1NT: To play
• 2NT: 4+ fit, constructive or stronger
• 3NT: To play
• 1/1: Natural, forcing
• 2/1: Natural, non-forcing
• RDBL: 9+ HCP or constructive raise with 3-card fit
• Jump shift: Weak, constructive
• Double jump shift (if not game): Good suit and fit in opener's suit

Responses after opponents Natural Over-call

• Raises: Preemptive
• 1NT: Stopper, limit
• 2NT: 3-card fit, limit+
• DBL: Negative up to 4D
• New suit: Natural, round forcing
• Cue-bid: 4+ fit, limit+
• Jump cue-bid: Splinter
• Jump shift: Weak, constructive
• Double jump shift (if not game): Good suit and fit in opener's suit

Responses by a passed hand

• 2C (Drury): 3+ fit OR 6+ clubs
• 2M: Weak, 6+ suit
• 2H after 1S: Weak, 5+4+
• Reverse 2S or higher: Natural, slam try
• 2D: Otherwise
• 3C: Natural
• 2M: To play
• 2M': Max, 5 cards in M' and 3 cards in M
• 2NT: As above with 5 clubs
• 3D: As above with 5 diamonds
• Other shifts: Natural, non-forcing
• Jump shift: Weak, constructive
• Double jump shift (if not game): Good suit and fit in opener's suit
• 2NT: 4+ fit, Splinter OR 10-11 HCP balanced. See Splinter above.
• 1S over 1H: Round forcing
• 1NT over 1S: Semi-forcing - developments are the same except that opener can pass