Flannery has been discussed before. I came across this thread by Yzerman in the Advanced and Expert Forum
http://www.bridgebas...ty-of-flannery/
This is what he had to say about Flannery:
I was prompted to write a small argument for the Flannery cause because of the recent Multi thread (in beginners section). Personally, I have found the gains of playing Flannery far outweigh the risk and my opportunity cost (with respect to other conventions is at a minimum). I have been repeatedly bashed over the years for playing this "archaic" and "simplistic" and "ineffective" convention, but guess what, I have NEVER got to wrong contract because of Flannery.
Why do I like Flannery?
a) I REFUSE to rebid a 2 card club suit after forcing NT
b) I REFUSE to rebid a relatively poor 5 card heart suit
c) Constructive preemptive value
d) The ability to play 4H or 4S from either hand (via South African xfers)
e) Responder has a roadmap regarding hand evaluation
f) Constructive game/slam bidding
Why do I prefer Flannery over Multi?
a) My suits are disclosed (no guessing or asking)
b) Luxury of playing @ 2 level in a misfit (4/3 or 5/2)
c) I dont really care about preempting a hand with 5 card major and 4 card minor (In the back of every bridge players mind when they open 2H or 2S Dutch Multi, there is the fear of going for phone number - not the case with Flannery).
Over my 4 years of playing Flannery and experimenting with different caveats, I have found that a few additional conditions optimize the overall effectiveness;
a) NEVER open 2D with a void (4504, 4540, 4603, 4630)
b) NEVER open 4513 or 4531 with 2 bad suits (rebid fragment upon forcing NT)
c) Have sound agreements with respect to game tries
d) Overall, have a good Flannery structure, dont just play Flannery for the sake of playing Flannery
And a quick story to support my argument. Playing in a regional swiss event a year or two ago, we were paired against one of best teams in field (Roman/Grosvenor team). My partner opened 2D and as my RHO passed, he commented in his usual jovial, humorous way, "Flannery is the worst convention ever created". We proceeded to have a constructive auction to 7S as my partner was able to describe a picture 4612 hand (AQxx AKxxxx). The pair at the other table (two professional players) got to 4S (obviously not well bid, but I am not sure they will get to 7 even if they bid past 4S).
Yzermans thread received 26 replies for anyone else interested in this topic and wanting to read them.
http://www.bridgebas...ty-of-flannery/