Developments
Various developments
Developments after 1(2) over 1 : Simple – Advanced 
The 2NT jump rebid : Denies 4 cards in ♠ – Doesn't deny 4 cards in ♠
3rd suit forcing : No – Yes
4th suit forcing : No – Yes
Developments after a major opening
No Trump fitted : None – 2NT fitted – 2NT and 3NT fitted
Game try bids : None – 2NT – 2NT or a weak suit
Delayed support : Natural – Forcing (slam hope)
Splinters : No – Yes
Jump takeout : None – Strong one-suiter
After a suit overcall : Simple – Advanced
Developments after a 1NT or 2NT opening bid
Stayman 2♣ and 3♣ convention : None – Standard
Jacoby transfers : None – To majors (Simple) – To majors (Advanced) – To majors and minors (Advanced)
With a major two-suiter at least 5-5 : None – 4♦ (limited to game)
Developments after a Stayman response (Advanced)
Smolen convention (after 2♦ and 3♦) : None – At the 3 level
Jacoby transfers (after 2NT and 3NT) : None – Simple (4♣ and 4♦) – Advanced
Splinters (after 2♥ or 2♠) : No – Yes
Other major as slam try after 2♥(♠) or 3♥(♠) : No – Yes
Splendid Poverty (after 2♦, 2♥ or 2♠) : No – Yes (with a shortage) – Yes (with or without a shortage)
Bid of a new minor suit (after 2♦, 2♥ or 2♠) : No – Yes
Developments after a Jacoby response (Advanced)
After 1NT, transfer with jump : No – Yes
After 2NT, transfer shows support : No – Yes
After 1NT, Splinters after transfer : No – Yes
Developments after a forcing opening
Responses to 2♣ : 2♦ relay – 2♦ relay + natural suits
Responses to 2♦ : Simple, unspecified aces – Major and minor ace + 2 aces – Major and minor ace + CRM
Developments after an overcall
Collante : No – Yes
Negative double : None – For responder (simple)
Rubensohl : None – Classic – Modern
Other conventions
Roudi 2♣ : None – Full, unlimited – 3 responses (weak 3♣) – 3 responses (strong 3♣)
2NT mini cue-bid : No – Yes
Drury 2♣ : None – Standard – Drury-fit
For slams
Blackwood : None – Standard – Modern 30-41 – Roman Key Card
Quantitative bids : None – Simple – Advanced
Control bids : None – Simple – Advanced
Tooltips help you understand the bidding if needed.
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