A 4 card fit

Response bids to a 1♥ or 1♠ overcall : with a 4 card fit
Your P has just overcalled and can have from 8-17HCP. (X as of 18HCP). He has a minimum of 5 cards in the bid suit. You can support his bid in different ways depending on your point count :

the weakest support bid is a jump fit to 3♥ or 3♠ : You need 4-7HCP and an irregular distribution : this is a pre-empt
intermediary support bid is : a jump cue-bid of Opener's bid with 8-9HCP
Positive support bid is 2NT for which you need at least 10HCP
jump shift bid : a 4 card fit and a strong 5-carder
double jump shift bid : a 4 card fit and a void/singleton in Opener's suit (Splinter Family)
Much less frequent : with 4 trumps, a non jump cue-bid : looking for a possible Slam

S	W	N	E

Problem 9912 3♥ : the weakest support bid is a jump fit showing 4 trumps. Pre-empt bid. Trying to stop Opps from finding ♠ contract.

S	W	N	E

Problem 9913 3♣ : intermediary support bid. A jump cue-bid with 8-9HCP

Positive support bids

S	W	N	E

Problem 9914 2NT Positive support bid needing at least 10HCP

S	W	N	E

Problem 9914 2♠ Jump shift with 4 trump cards and a strong 5 carder.

Slam Bidding

non-jump cue-bid is the strongest support bid :
- this is quite a rare bid needing 4 trumps
- this is used as the starter to finding a possible Slam contract
- Don't forget this bid doesn't promise a fit, but shows Slam interest
Double jump cue-bid is a Splinter (void/singleton in Opp's suit) a minimum of a 4 card support and strength to go to Game
This bid denies a strong 5-carder, otherwise you need to bid "meet-me"

S	W	N	E

Problem 9917 2T non-jump cue-bid : Departure point for the start of Slam bidding.

S	W	N	E

Problem 5253 Double jump cue-bid : Splinter equivalent. Short in the Opener's suit, at least 4 trumps and strength for Game...

Main

Detail specifications 41DB - Level 3 ★

A 4 card fit

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