Conventions and guides, chapter
Responder's second bid

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Code	Subject	B	1	2	3	4
220A	After a weak or ambiguous rebid		★
220P	The reponder's bids, not fitted and with a weak hand			★
221A	Responder repeats his suit			★
227A	2/1 Game force - Responder's second bid				★
22BC	After a 2 over 1 suit change by responder			★
22DB	The Responder's second bid with a fit	★
22DE	Responder's support bids of a major at the 3 level			★
22DF	After an economical 2-suiter and a 1NT 1st response : level 2			★
22DH	Response to a 2NT trial bid			★
22DI	Response to a trial bid			★
22FB	After an economical two-suited bid		★
22FE			★
22FH	After a strong 2 suiter bid by Opener		★	★
22FI	The 'scrambling' 2NT after strong two suiter bid by opener			★
22FJ	The opener's reverse			★
22GB	The opener has repeated his opening minor suit				★
22GK	After 2/1 response and repetition of his suit by opener		★
22GM	After a jump rebid by opener			★
22HE	Responder's 2nd bid after Opener's 1NT 2nd bid		★
22HS	Bids after Opener's 2NT rebid			★
22HU	Bids after Opener's 2NT rebid				★
22LC	The Responder after a Stayman	★
22MA	The responder's second bid after the opener's support		★		★
22QG	Resmponder's 2nd bid after a strong 2♣ opening		★
22TB	Impossible bids after a 1NT initial response			★		★
22TK	The forcing fourth suit		★	★
22TM	3rd suit forcing			★
22TN	3rd suit forcing			★