[nullve]

I've seen a couple of references to Liggins Gerber on BBF, but what does the full convention look like?

[steve2005]

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[nullve]

From the Gucci Lebensohl - Fast and Slow thread:

PhilKing, on 2015-September-19, 16:22, said:

In regards to this situation I would recommend a convention I call "Liggins Gerber" - a jump to 4♣ shows a good 13+ with at 5 cards in the unbid major (ie a slam try). With a game force in clubs we can bid 2NT then 4♣ with a slam try or follow one of the flexible routes when trying to keep 3NT in the picture.

Liggins Gerber is also useful in many other auctions, most commonly after 1♥-3♠ or the converse: 4♣ now shows a slam try in hearts and 4♠ shows a slam try in clubs.

So Liggins Gerber has something to do with 4♣ showing the unbid major in some situations? (Which?)

From the Do pre-empts work? thread:

PhilKing, on 2013-September-07, 09:08, said:

After 1♣-3♠, hands with hearts are a real problem. I play something pretty good here, which is loosely based on "Liggins Gerber":

4♣ = 6+ hearts, circa 13+
4♦ = natural, GF
4♥ = nat, max circa 12 points
4♠ = clubs, slammish
4NT = two suiter, hearts plus minor, big

With clubs, you usually double to keep 3NT in the frame, so losing 4♣ is not bad.

But if this is only "loosely" based on Liggins Gerber, what is Liggins Gerber exactly?

[PhilKing]

nullve, on 2018-March-21, 02:34, said:

From the Gucci Lebensohl - Fast and Slow thread:


So Liggins Gerber has something to do with 4♣ showing the unbid major in some situations? (Which?)

From the Do pre-empts work? thread:


But if this is only "loosely" based on Liggins Gerber, what is Liggins Gerber exactly?

.
The idea, as I heard it, just applied to the sequence 1♥-(3♠), where 4♣ is used to show a good heart raise and 4♠ to show a one-suited slam try in clubs.

But I also like to use it where hearts is a new suit (as described above, and also after 1NT-3♠) and also in some fairly weird spots such as 2♠-Dble-P-4♣. It is less useful if partner has opened 1♠, since you can make a cue bid below the level of game. However, I still think it's a winner after 1♠-3♥, for instance, since the good spade raises are way more common (and important) than the club hands.