[Cascade]

I play :

1. Fit showing jumps over a minor

Well actually only 1m 2M.

1♣ 2♦ is any invite with clubs

1♦ 3♣ is a splinter

The fit jumps are an excellent springboard for slam (and game).

More specifically we play

1m 2M = 4+ m 4+ M and 10+ hcp

2. Splinters over a Major

1♥ 2♠ = balanced raise

1♥ 2NT = spade splinter

otherwise the splinter is in the suit bid.

These splinters are invitational or better.

The extra bidding space available after a splinter below 3M is invaluable. On slam auctions we are frequently showing queens below game.

[Gerben42]

I play:

1♣ - ?
* 2♦ = nat. GF unbal.
* 2♥ = 5♠ 4♥
* 2♠ = Minors

1♦ - ?
* 2M = Inv. Jump Shift
* 3♣ = Mixed ♦ raise

1M - ?
--> See "improving 2/1 GF" by FG , i.e. cheapest JS = Jacoby, Bergen, 2NT nat. GF.

[mike777]

Prefer to play neither weak nor int. nor strong jump shifts assuming the opp are silent.

For the most part my jump shifts show various raises of one kind or another of opener's bid suit or 1minor=2h=reverse flannery.