|Pass||Shows clubs or diamonds or both majors. Partner is required to bid 2.|
|2||At least 4-4 in clubs and a higher suit. Partner can pass or correct to 2 asking for the higher suit.|
|2||At least 4-4 in diamonds and a higher suit. Partner can pass or correct to 2 asking for the higher suit.|
|2||Natural, at least five hearts.|
|2||Natural, at least five spades.|
Responder's rebids after the sequence
1NT X Pass! Pass
|Pass||Shows at least five clubs.|
|2||Shows at least five diamonds.|
|2||Shows at least 4-4 in hearts and spades. Partner can pass or correct to spades.|
With 4-3-3-3 shape, responder can either treat his four-card suit as a five-card suit, or he can treat his four-card suit and his best 3-card suit as a two-suiter.
2013 © Jeff Tang. All Rights Reserved.