kenrexford, on Jan 14 2008, 08:36 PM, said:
I don't understand the system parameters enough, but I'll guess using the given info and the apparent problem.
I also play an unbalanced opening of 1♦, and have been doing so for perhaps 20 years. But, the 1NT rebid here would nearly guarantee contextually poor shape. Meaning, shortness in spades and either 1444 or 1453. A 2♣ rebid would show at least 5-4 in the minors.
So, it appears that maybe your 2♣ rebid shows something different, like transfers. 2♣ would then be a "diamond rebid," and 2♦ showing hearts and diamonds?
If this is accurate, then it seems that the approach may gain in many auctions (when Opener is tweener+, perhaps, and can pattern out) but loses in the inability to show an unshapely minimum as a passable 1NT. OK, a cost. So, do you risk 3♦ opposite the weak hand, or risk a drop at 2♦? IMO, if the approach is designed to enable patterning out by Opener on tweeners, then bid a mere 2♦, which gains when Opener does have a tweener and patterns out at 2♠.
Play on the system strengths and trust them. Accept the weaknesses. The strength of system is in Opener patterning out on lesser values, it seems, so enable that. If the system fails, switch systems. But, do not switch system by failing to trust it and manufacturing anti-system calls mid-auction. A call is "anti-system" if and when it runs afoul of system philosophy.
Our 2
♣ bid is made for hands with longer clubs. That could be a 1=3=4=5, 0=4=4=5, 1=4=3=5, or occasionally a 1=2=4=6 with concentrated diamonds (something like x Ax AKQx xxxxxx).
We could go the route of using 2
♣ as 4-5 either minor longer, but have found that we actually like clarifying so responder can take proper preference.
One thing that is relevant is that 1
♦ - 1NT is artificial GF. So perhaps it's as simple as using fourth suit invitational and being done with it.
I'm not quite sure what you were getting at with system trust. Specifically the issue here is how to invite opposite what might be a light shapely opening. The lighter the hand (and typically the more playing strength we'd like), then the heavier the invites need to become. Kind of a quid pro quo.
1♦ (1) - 1♠
1NT (2) - ?