[skjaeran]

All these used to be 55 GF's for me.

But for some years I've been playing the xyz-convention, which apply after 1/1/1. It's very similar to the xy-NT (or 2-way check back or whatever). And then jumps in the fourth suit after bidding three suits at the 1-level became 55 INV, since all GF hands rebid 2♦.

Now I prefer to use 2♣ with all INV hands (and drop dead in 2♦), 2NT as a puppet to 3♣ (to drop or certain special GF hands) and all jumps are returning to be 55 GF.

[awm]

It seems popular in my area to play that jump in the 4th suit is 5-5 or better invite. Game forcing two suited hands go through 4th suit forcing (most play as game forcing).

Weak canape hands leave you stuck, you have to generally correct to opener's first suit.

Note that even not playing Walsh these hands will come up in sequences like 1♦-1♥-1♠ with longer clubs than hearts or 1♥-1♠-2♣ with longer diamonds than spades.

This is different from when opener rebids 1NT.