[thorvald]

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Now it would be interesting to show a 5+♥ with forcing values, or in some way check if opener has a 3-card support, but the bids shows the following

2♣=Retreat from NT
2♦=5+♣ and 4+♥, forcing to 3N
2♥=Retreat from NT
2♠=4+♠, 5+♥, forcing to 3N
2N=4♥, 11-12 HCP
3♣=5+♣, 4+♥
3♦=2-suited bar bid, 6+♦, 4♥
3♥=6+♥, invitational
3♠=Same as 2♠ :-)
3N=4+♥, 17- HCP

the 2♦ is strange and 3♦ just looks odd, but it seems that I should either show 5+♣ or 4+♠.

Lets try with 2♠ as opener has denied 4♠

That got us to the normal 4♥

[smerriman]

2♦ used to be new minor forcing as you'd expect. Must have introduced a buggy rule about cue-bidding an opponent's suit that got a higher priority.

[thorvald]

Yes, I think it is a fine rule that a direct cuebid is showing support, but never after a bid in a new suit. Then a cuebid should be asking for more information, probably with focus on stoppers

[steve2005]

restricting 2♦ to hands with 5+ clubs is just a poor use for the bid.
Sure with 5 clubs and gameforce the right bid is 2♦
but you have no bid for the much more common 5♥ invite

Surely 2♦ is the call and with 5+♣ GF you bid 2♦ then 3♣

[helene_t]

Yes there is a hole in the system.

You can bid 2♠ with this hand, partner has denied spades so won't raise. But with an invitational hand with five hearts you have a problem (regardless of whether you have four spades or not).