|Pass||Shows at least 4-4 in two "non-touching" suits (clubs and hearts, clubs and spades, diamonds and spades), or a hand worth a penalty redouble. Requires partner to XX.|
|XX||Shows a one-suited hand. Requires partner to bid 2.|
|2||Shows at least 4-4 in clubs and diamonds. Partner can pass or correct to diamonds.|
|2||Shows at least 4-4 in diamonds and hearts. Partner can pass or correct to hearts.|
|2||Shows at least 4-4 in hearts and spades. Partner can pass or correct to spades.|
1NT X Pass! Pass
1NT X XX! Pass
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.
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