PassProhibited response; the fit-jump is a forcing bid.
Jump shiftnatural, game-forcing
Unnecessary jump shift up to Splinter LevelSplinter, agreeing partner's trump suit and showing a small singleton or void. Splinters are normally game-forcing, but if two of them were available then the lower is merely invitational, e.g. 1C 1S 3D/4D are both splinters, since 1C 1S 2D would have been a reverse.
Agreed suit, any level except 5to play
Raise fit-jump major3-card support, slam try
Raise fit-jump minorGame-forcing, not Minorwood
2NTforcing relay
3NTSerious 3NT
4NTRKC Blackwood
New suitTrial bid, even at the 4-level. A hand that wants to cue bid can go via the Serious 3NT.
Jump shift below 4 of agreed suitsplinter
5-level rebidquantitative invitation to 6 of suit
Jump shift to Blackwood LevelExclusion Blackwood
Jump shift to Grand-Hunting LevelComplete two-suiter. If the partnership had previously bid more than one suit and so there's ambiguity about which suits are being promised, then the other one is the first-bid suit of the player who just jumped.
Any slamNo systemic agreement; the natural interpretation
Copyright 2015 Finn Clark.