1NT doubled runout

1NT (X)

  1. P forcing xx, if doubler then passes
    1. pass is to play (v. juicy)
    2. 2C is 4333 not 4C
  2. xx 5C or 4441, singleton C, puppets 2C, if doubled
    1. pass shows 5C
    2. 2D shows 4-4-4-1C
  3. 2C 4C in a 4333, or any 2 4-card suits, sit unless doubled then
    1. P 4C (maybe & another 4 card suit)
    2. xx 4D & 4H, mnemonic redouble = reds
    3. 2D D & S
    4. 2H 5H & 4S (mnemonic link C to H)
  4. 2D 5D to play ostensibly but might be both majors, if doubled then
    1. pass shows 5D
    2. redouble with equal length in the majors
    3. 2H with 5S and 4H (mnemonic, link D to S)
  5. 2H to play
  6. 2S to play
You can’t play in 1NTx using these methods, which is a downside

1NT P P x P P

P 4333, not 4C, too bad; or you don’t mind 1NTx

xx 5C

2C 4C or 2 4-card suits

else natural