Shows 5+ C, unbalanced approx 11-13 points

playing strength hands with 6+ C can open 1C (strong) or 1D treat as 13-15 bal)
can have 5+ Clubs if great suit, but a 4315 hand could open 1S, 1NT, or 1D if it wanted to.

..2D: Tfr to H, usually some values
..2H: Tfr to S
..2S: ART - INV C, or GF (not C)
..2NT: ART - GF C, asks shortage
..3C: PRE
..3D: NAT, GF !
..3H: 6+H GF
..3S: 6+S GF
..3NT: probably forgot all the awesome system.
..4C: PRE
..4D: PRE
..4M: To Play from my side (can start with a 2-red TFR otherwise)

..2H (mostly) NF
..2S/2NT/3C: Super reject H
..3H: 3+H GF
..3S/4D: SPL for H

……If Responder then bids
……3C: Non F
……Not really INV in C
……Sort of INV in the Major, but missed a fit.

..as above

..3C Min
..2NT Max (then 3C forcing and shows some Clubs, implies interest in a major, else just go 3NT)
..others (Max, SPL, great C) #
……then
……3D: Stayman
……3M: 5 cards GF

..3C: no shortage min
..3NT: no shortage max
..3new: 0-1

..Weak with a 5+M Tfr (2D/2H)
..Strong with a 4cM, use 2S then 3D Stayman
..Strong with a 5cM, Tfr then bid again
..Strong with a 6+M good suit, bid 3M

..Weak Clubs, 3C, 4C, more C
..Strong C start 2NT

..Weak D, Pass
..Strong D start 3D

..NT, INV perhaps 2S (play in 3C if min),
..Strong 3NT