[Jinksy]

After the auction 1H P 1N P, I don't know how Gib actually thinks, but the description asserts it has no way of dealing with 4522 hands - 2m bids claim they show 3+, 2H 6+, and 2S reversing values. Surely it should have a consistent understanding of an auction as common as this?

[smerriman]

GIB just bids 2♣. Often the descriptions don't line up with the actual logic.

[mycroft]

As does basically everyone playing 2/1 without Flannery or other gadgets to handle this hand or to exclude 2♣ from the running. So much so that in the 2000 ACBL Alert Procedures, this agreement was an exception to the "not-Natural, Alert" rules, provided it was only and exactly this hand, and there was nothing in your system to cater for it.

[Jinksy]

smerriman, on 2021-March-16, 02:28, said:

GIB just bids 2♣. Often the descriptions don't line up with the actual logic.

Right... this just seems like an easy description to fix.

[pigpenz]

It would seem that this is just bridge especially 2/1 style....your only option is to pass 1NT and hope
partner wasn't making a delayed limit raise

[mikestar13]

The Kaplan-Sheinwold system book had a paragraph or or so about choosing which way to violate system with 4=5=2=2 shape and insufficient values to reverse:
When only a small bit short of a reverse, open 1 ♥ and stretch to rebid 2♠.
With strong hearts and weak spades, open 1♥ and rebid 2♥.

With strong spades and weak heats, open 1♠ and rebid 2♥ (!)
With weakish majors and strong doubletons, open 1♥ and pass 1NT.
2♣ wasn't even considered.
Rather than contemplate bidding 2♣ as most people would these days, Edgar inverted the Kaplan Inversion about the same time as Richard Granville was inventing it in England. (I play KI, by the way--this is not a criticism.)