1NT could contain 5-M. Answers include m-transfers.

/1NT: 15-17, B (no 0/1, max 1 doubleton, so 4333, 4432, 5332). Can contain 5-M.

Answerer:

- PASS: 0-7

- 2♣: *ALERT* asks for M, but doesn't promise 4-M.

Answerer must process via -2♣ to rebid an -2NT limit. 2NT as a first answer is reserved for transfer to ♦.

/2♦: no 4-M

/2♥♠: 4-M

/2NT: 5-M

- 3♣: which M + strength?

/3♦: 5-♥, max

/3♥: 5-♥, min

/3♠: 5-♠, min

/3NT: 5-♠, max

- 3♦: which M, not interested in strength (probably Weak Stayman)

/3♥: 5-♥

/3♠: 5-♠

-2♠(NT): transfer for ♣(♦): no 4-M, 0-6, 6+m OR 12+, 5+m

/2NT: intermediate bid: fit: 3+m1 AND top-honor (A or K)

/3♣: execute transfer: no fit

Purpose: with m-fit we can end in 3NT (as of 5+HP), and possibly slam (12+HP). With few HP and 6+m, we'd rather play a 3m-contract than NT.