COMPETITIVE AUCTIONS

Following Suit Interventions:

Negative Doubles: 1-level: (7)8+ HCP; 2-level: (9)10+; 3-level: (11)12+ Usually shortish in opponents suit
Suit bids. usually 5+ card suit; HCP less than those shown above for intervention
Jump suit bids. Usually 6+ card suit; HCP less than those shown as above
Cue bids. Show 2 highest unbid suits
xNT bids. Solid raise of partners suit at next level
PASS. Can have values in opponents suit
All suit bids other than cue bids: Non-forcing
Raises of partner's suit: Pre-emptive

Following Take-out Double intervention:

Redouble: 8+ HCP
Suit bids (including jumps): Non-forcing
Raises: Pre-emptive
xNT bids: Show solid support at next level

Following Partner's T-O Double:

Negative: Lower minor or PASS if RHO bids
New suit at same level: Natural
New suit at next level: Suit + next suit, less than 11 HCP
New suit at next+1 level: 6+ card suit to play
1NT: Forcing: 2C inquiry or natural
J2NT: 11-(13,14 flat) if bid without jump (9)+. Continuations Puppet
Cue-bid: Single-suited hand. NT bid asks
*: if RHO bids: the suit below

OTHER CONVENTIONS

Puppet following any 19+ NT rebid - (all responses forcing)
Crowhurst 2C inquiry following a 1NT rebid 12-16 HCP balanced
Other minor inquiry over a 2NT 12-14(15 flat) HCP balanced rebid
4C¦D Swiss following partner's 1Major opening
Following Partner's T-O Double:

Negative: Lower minor or PASS if RHO bids
New suit at same level: Natural
New suit at next level: Suit + next suit, less than 11 HCP
New suit at next+1 level: 6+ card suit to play
1NT: Forcing: 2C inquiry or natural
J2NT: 11-(13,14 flat) if bid without jump (9)+. Continuations Puppet
Cue-bid: Single-suited hand. NT bid asks which
Co-operative *: if RHO bids: the suit below

1S-1N-2C: Requests a 5 card suit, 2S denies, 2NT shows Clubs
TRAP over 1C strong
1C or 1D alerted then: 2C or 2D Natural
1NT o'call is unusual. Lowest unbid suit is anchor suit. 2C¦D usual responses, PASS or * over intervention. Rebids if opening NOT alerted:

Anchor suit or PASS pre-empt in Anchor suit; 3-level strong 6+ card suit
3C lowest 2 unbid suits 5-5 weak 6-7 LTC
2H lowest 2 unbid suits 5-5 strong 4-5LTC
2N 3-suited;
2S minor suit pre-empt - 2N requests.if no intervention
2D game force '2C opener' suit based.

Two suited overcalls (other than 1NT above)

Cue bid: The two highest - not over artificial minor openings
2NT highest + lowest 5-5 - weak
Jump minor cue-bid: both Major suits - strong
J3C¦D The suit bid + The highest unbid suit

1NT over an alerted minor can be played in the same manner as usual ignoring opponents artificial minor OR OPTIONALLY the alternative 'unusual' approach can be used instead.