2/1 system with no ACOL bid

[nullve]

The way round this problem is to play some sort of GF gadget rebid (we use 2N which is easier to do playing a weak NT), or to play change of suit as "forcing if you had a real response" or to play gazilli.

In one partnership I played Meckstroth Adjunct not only over 1M-1N but also over 1R-1M/N. (We opened 1♣, "NAT or BAL", with 18-19, 5H(332), btw.) So over 1♥-1♠,

 

(...)

2N = GF, no 5c or longer minor (=> 3♣ = relay (=> e.g. 3♦+ = NAT))

3m = GF, 5+ m

(...)

 

Certainly better than standard, and simpler than Gazzilli.