Jlall, on May 4 2010, 04:05 PM, said:
Junyi's examples are quite bad as jdonn has indicated.
That being said Junyi's point that jumpshifting into fake club suits can be problematic, mainly on hands where you actually DO have clubs. These problems are not as bad as he indicates imo, but they're obviously real. This is easy to see theoretically.
I don't think anyone who thought about it for 2 seconds would argue for using 2S as natural and 3C/3D as possible fake jumpshifts on the basis of it being superior.
The truth is that all bidding systems suck, and the less artificial they are, the more they suck. Of course, the more artificial they are, the more chance of human error, so they suck as well.
As for finding that using 2
♠ as a force is better than a possibly fake 3
♣, sure, that can work but only by declaring that a natural bid is completely artificial AND instituting a relay method to permit description of the hand by opener, presumably over an artificial 2N.
And arguing for gazilli is much the same. Suggesting that the answer to the OP is to tell partner, mid auction, that we are now playing a new convention is problematic, even if partner knows the convention. The opps may object.
As I posted earlier, many of us have gadgets. Mine has been an artificial 3
♣, with 3
♦ available as a relay to permit clarification. After a 1N reponse, my 3
♣ shows either clubs or a monster one-suiter: over 3
♦, 3
♥ shows hearts, 3N shows clubs but willing to play 3N, and 4
♣ is an extreme 2-suiter. 3
♠ is undefined in the notes but should, I think, show 3 card diamonds, to cater to finding diamonds when that is responder's suit.
Over 1
♠, the same scheme applies, but 3
♠ now shows 3 spades.
This scheme is imperfect, but then so is everything, including gazilli and the fake 2
♠.
Given the constraints of the OP, and therefore NOT being allowed to introduce our preferred artificiality (I mean, why not say undo and insist on playing precision?), 3
♣ is the clear choice...isn't it?
'one of the great markers of the advance of human kindness is the howls you will hear from the Men of God' Johann Hari