2 = Minimum-Balanced or 3-suiter 　 2 -2 3-suiter, low-$ 　 -2NT Min-Bal 　 -3+ 3-suiter, high-$ 2NT -3+ 4441,(5)440 3 -3+ 443(2) --> 　 4441,(5)440

2+ = S2-Scheme (Majors)

Following the 2, the auction develops like this:

• Responder may pass 2 or 2.

• If responder bids 2NT, opener must bid 3!  responder may pass 3, or convert to 3 which is absolute sign-off.

• Direct bids of 3/ by responder who has responded 2 show a six-card suit and are invitational.

KJxxx x 1NT 2 A10xxx xx 2 2NT x KJ10xxxx 3 3 Ax Kxx Pass

Kxxx Axx 1NT 2 A9xx x 2 3 AQx Jxx Pass 　 10x KQ9xxx