The Power 1NT Opening - Facts
 Opening bid point ranges for Balanced hands : 1NT Opening = 17-20 pts, balanced     Minimum = 17-18 pts     Maximum = 19-20 pts Responder must bid with 6+ pts, or even with a good 5 pts hand. 1NT → 2NT = 6-7 pts, and is invitational to 3NT 1NT → 3NT = 8+ pts, to play Other Response options consist of two special features : Modified Stayman and Suit transfers. A. Modified Stayman 2♣ Convention : the Responder must have a 4-card major. Opener's Responses at the 2-level show a minimum 17-18 pts   a. 1NT - 2♣ → 2♦    = 17-18 pts, no 4-card major   b. 1NT - 2♣ → 2NT = 17-18 pts, both majors     (Responder may use a transfer to the trump fit major :   3♥ → 3♠   or   4♥ → 4♠) Opener's Response at the 3-level show a maximum 19-20 pts   a. 1NT - 2♣ → 3♦ = 19-20 pts, no major suit   b. 1NT - 2♣ → 3♣ = 19-20 pts, both majors     (Responder may use a transfer to the trump fit major :   3♥ → 3♠   or   4♥ → 4♠) B. Suit transfers : must have a 5+card suit.   They have two useful advantages : 1. It puts the Opener "on hold" → Responder can describe his hand in two bids 2. The weak hand will usually be the exposed Dummy hand Suit transfer → a major suit With a 5+card major Responder bids the suit one step below his long suit at the 2-level. Opener then must bid the next suit up the line. 1NT - 2♥ → 2♠ = usually at the 2-level 1NT - 2♥ → 3♠ ("super accept") = at the 3-level, showing 19-20 pts and 3+cards support After Opener's transfer to a major suit, the Responder replies : 1NT - 2♦ - 2♥ → Pass = weak hand (Rescue bid) 1NT - 2♦ - 2♥ → 2NT (or 3NT) = 5-card major, balanced 5332 1NT - 2♦ - 2♥ → 3♥ (or 4♥) = a 6-card major 1NT - 2♦ - 2♥ → 3♣ (or 3♦) = 4+card suit, unbal. or semi-bal with weak doubletons With 5-4 in the majors : bid 2♣ first, then if required bid your 5-card major With 5-5 in the majors : transfer to ♠, then bid 3♥ Suit transfer → a minor suit Usually only do a minor suit transfer with an unbalanced hand an no 4-card major. But you may also transfer with a semi-balanced hand which contains two weak doubletons. 1NT - 2♠ → transfet to 3♣         1NT - 3♣ → transfet to 3♦ Responder's replies are similar to replies after a major suit transfer, except : 1NT - 3♣ - 3♦ → 3♥ (or 3♠) = a singleton or void in a bid major suit 1NT - 3♣ - 3♦ → 3NT = 54 in the minors with two weak doubletons Any immediate Response at the 3-level is forcing :   1NT - 3♥   (no transfer) It shows a 6+card suit, and an interest in Slam. Do not use transfers when Opponents enter the bidding ! After Enemy interefrence : 1NT - (2♥) → DBL = Stayman with 6-7 pts (Opener may either Pass or reply) 1NT - (2♥) → 3♥ (raise Opponent's Overcall suit) = Stayman with 8+ pts © 2016 Michael Furstner