1. Checkback (1♣ – 1♠ – 1NT – 2♣)
Asks opener to support ♠ with 3 cards in that suit; bid 2♥ with 4 cards in that suit; otherwise bid 2♦, or 2NT if maximum.
Agreements
Conventions & carding
Conventions
2. Roman Key Card (RKC 1430)
4NT asks for controls after a suit is agreed. Controls include the king of the agreed suit. Responses:
- 5♣ — 1 or 4
- 5♦ — 0 or 3
- 5♥ — 2
- 5♠ — 2 and the trump queen
3. Gerber
4♣ over a NT opener or rebid — ace-asking, standard responses.
Leading styles
Second and fourth: lead the 4th highest from a suit with an honour, 2nd highest from an empty suit.
- The lead of an Ace or Queen asks for attitude.
- The lead of a King asks for count.
- The lead of a 10 has three possible meanings: a doubleton, top of a sequence, or two non-touching honours (e.g. AJ10x).
Carding & discards
- Following suit: reverse attitude, natural count.
- Discards: reverse attitude.
Key
- M= Majors
- m= Minors
- NT= No Trump
- s= suit
- a= another suit
- l= lower suit
- x= Double
- xx= Redouble