[Syl20]

Hi,
I am considering playing a TWalsh structure.
Since one of its aim, in addition to discretion, is to right side the contract, I thought of this scheme over 1♣ (12-14 or 18-19 balanced or 12+ with ♣s):

1♦/♥=4♥/♠, 6+
1♠=a-) transfer NT with 6+ or b-) 11+, 5♦ (may be a 4 card major)
1NT= 6-10, 4♥+4♠
2♣=Inverted minor raise without 4 card major
2♦=6-10, 5♥+4♠
2♥/♠=5-9, 6♥/♠
2NT=11-12, invitationnal

Maybe this scheme concerning the 1♠ bid already exists, anyway I didn't find it elsewhere.
The advantage is that when responder is weak without major, the opener will always play 1NT. And when he's intermediate or better, he can choose between a direct 2NT bid or transfer via 1♠ if he wishes to receive the lead or not.
Although, 1♠ can be irregular with ♦s. In that case, he will simply bid on his suit over opener's last bid.
The only drawback I see could be the 1NT bid when opener is balanced whithout 4 card major, wrong-siding the contract.

I would be happy to know what you think of that and to point out what other drawback i (must) have missed...

[blahonga]

An older version of Björn Fallenius's and Roy Welland's system includes something similar:
http://www.syskon.nu...welland_2-1.pdf