Posted 2007-April-23, 13:00
Seeing as the auction featured a 3NT call with a void, I assumed that 3NT showed a void. Of course, you could play that 4♣ shows a boid, such that 3NT shows a stiff and therefore agrees spades. But, that seems counter-intuitive to my way of thinking about an unbalanced diamond system.
A simple example of this principle might help.
Assuming that 1♦ promises a stiff or void (or perhaps a rebiddable diamond suit or 2245/2254), what does this auction show:
1♦-P-1♠-P-1NT?
Obviously, as Opener declined to rebid diamonds or rebid 2♣, the normal understanding is that the known shortness is in spades.
How about 1♦-P-1♥-P-1NT?
Now, Opener holds a stiff heart. The failure to bid 1♠ makes the most likely pattern 1354. In fact, we play that it guarantees 1354 pattern.
Same for jumps to 2NT, only stronger.
Using this principle, and applying a consistency idea, all NT bids isolate the shortness as the "worst" shortness, at least for partner.
On a similar vein. If the auction is 1♦-P-1♠-P-1NT-P-2♠, we know that the spade suit from Responder is very good -- he's opting to play a simple 2♠ contract notwithstanding the known shortness. How aout 3♠? This is forcing and natural, with intention to play in a spade contract, even opposite the known stiff or void.
So, look again at 1♦-P-1♥-P-1NT(1354)-P-3♥. Pattern is known (Opener's pattern), so 3NT has some other meaning. Possibly, this denies a stiff honor. Maybe this promises a stiff honor. Whatever.
What about 1♦-P-1♠-P-1NT-P-3♠? The same principle is at work. Opener will not likely have a void, as he'd bid 2♣ with 0454 and 2♦ with any hand featuring a 6-bagger in diamonds.
Well, if 2♣ removes all hands with 5+♦/4♥ from the normal 1NT response (or from the 2♦ or 2♣ responses, or from reverses), then the normal holding features a stiff spade. With 3451/3460, 3♣ from Responder will allow a 3♠ completion-of-pattern bid. 3♠, catering to a stiff, will likely feature a strange-sounding 4♣ call, indicating the unexpected club shortness (and hence probable 10-fit in spades). 3NT "declines" spades, again, with either a small stiff or a void, depending upon agreements.
Of course, this is not a required treatment, but it makes sense in the context of the unbalanced diamond opening.
"Gibberish in, gibberish out. A trial judge, three sets of lawyers, and now three appellate judges cannot agree on what this law means. And we ask police officers, prosecutors, defense lawyers, and citizens to enforce or abide by it? The legislature continues to write unreadable statutes. Gibberish should not be enforced as law."
-P.J. Painter.