After opponents' open at the one-level, you make a jump overcall of
2NT = lowest ranking two suits
3C = lowest and highest ranking two suits
3D = 2 highest ranking two suits
X = penalties of at least 1 of their suits Cue bid one of known suits to show tolerance for opener's suit & a control in the bid suit. (looking for NT if pard has the other one covered) Bid the 4th suit - forcing, support, good hand not interested in a penalty Simple raise of partner = limited Jump raise of partner = pre-emptive Jump in one of their suits = splinter Jump in 4th suit = big hand, play in 6 or 7?