◇ 1N!-2D!; 2S/2N!

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1N      2D!
2S      2N!     fit             (開叫的人最低限叫3S)
        3C!     ask control (the same)
        3D!     ask shape (3H/3S/3N=5232/5323/5332)
        3H      5+H (開叫的人不是叫3N都表示有配合的示叫)
        3S      better fit      (強迫開叫的人報控)
        4C      minors?

1N      2D!
2N!     3C!     ask control (the same)
        3D!     ask shape (3H/3S/3N=2533/3523/3532)
        3H      fit             (開叫的人最低限叫3S, 其他要報控制
                                 3N=牌組很爛但有控制, 4H=沒有A但非最低限)
        3S      5+S (開叫的人不是叫3N都表示有配合的示叫)
        4C      minors?