Double Barrelled Stayman

Over 1NT, 2 and 2 ask opener for a four card major. 2 is not forcing to game. 2 is game-forcing.

Over 2, Opener rebids:

• 2 or 2 to show four
• 2NT with 4-4 in the minors
• 3, 3, 3, and 3 to show 5 of that suit
• 3NT with exactly 4333 with 4 in a minor

This convention is used in Precision Club