helene_t, on Jun 19 2007, 05:09 AM, said:
Stephen Tu, on Jun 19 2007, 09:56 AM, said:
You don't need NMF for 1m-1s-1nt-2h to be non-forcing. This sequence has been non-forcing since the 40's at least and has never become std forcing as you seem to think.[....]
I agree that 2
♥ is non-forcing here. Really surprised there can be discussion about this.
What is less clear to me is if 2
♥ is a clear sign-off or if opener is allowed to make a game try with a suitable hand. Here, beginners used to be taught that the 1N rebid shows 13-14 so there is no need for invitational sequences. I suppose you can use 2N as a general force, then, but have never seen that mentioned. It is probably not something you'd like to teach beginners. A raise of 1N to 2N is invitational in other situations so it should be so here as well.
...and I'm just as surprised in the reverse.
One of the things this thread is really driving home to me is how unused to playing "natural" SA most players are. Gadgets get added so fast and played so exclusively that people evidently forget what their true overall effect is on SA.
When teaching beginners (at anything), it is important to make things as logically consistent as possible and to have as few exceptions or contradictions to overall principles as possible.
Thus we teach Responder's that their hands are "worth 1 bid if a minimum; worth 2 bids if invitational; and worth whatever it takes if GF".
A minimum Responder gets to suggest =a= suit, or bid 1N if they can't suggest a suit at the one level.
After that, a minimum Responder's only options are
a= passing if We are in a reasonable spot, or
b= choosing one of the other strains already suggested by the partnership.
c= making their one suit suggestion at the 2 level if they've limited their hand by bidding 1N first. (when I teach Lebensohl and Good/Bad 2N to more advanced players than novices, I come back to this as an underlying principle)
Playing natural SA, once novices learn the above, they do not have to memorize any sequences, they know exactly what to do with a minimum response no matter what Opener does when Opener does not make forcing bids.
The other way of teaching each sequence as a "stand alone" that needs to be memorized is horrible to contemplate.
Not to mention the typical novice's reaction to sequences that would be murky if 1m-1M;1N-2lower was nf.
Between the two issues, novices would drop out of Bridge at an even greater rate than they already do.
Besides the flaws in logic of the other approach that I've already pointed out, and despite the documentation contradicting the other approach I've already pointed out, here's another thing that is wrong with the idea that 1m-1M;1N-2lower natural is nf:
*If Responder's 2nd round jumps are GF and Stephen's POV is true, then We risk missing game more often than having 1m-1M;1N-2lower being forcing would.*
Minimum's just want to find a decent spot. Any decent spot. It doesn't have to be perfect.
OTOH, Invitational hands care much more about how well the hands fit because if they do, then We might belong in Game. Remember We teach SA novices not to add non HCP assets to the value of the Dummy hand until =after= a fit has been found.
Allowing a minimum hand more sequences to find a good spot at the expense of reducing the number of sequences an Invitational hand has available to probe for game is nonsensical.
(...and I'm well aware of the MP theory that says never invite, just decide and "pass or blast". Even if one agrees with it, that is not even close to appropriate as a teaching model for beginners.)
Quote
A more tricky issue is if
1♥-1♠;1N-2m
and
1♦-1M;1N-2♣
are canape or longest suit first. Here, beginners are taught it is canape but that may apply only in the context of a 4-cards-up-the-line system.
In SA, novices are taught to Open and Respond Longest Suit First and Up The Line w/ 44.
Therefore the above Responders are 54 or 55 in the 2 suits shown.
...oh, and in SA, opener's 1N rebid shows 12-14 balanced or 12-15 unbalanced (and misfitting).
This is in keeping with the SA teaching that it takes
a= 26 playing points w/o a fit, or
b= 25 playing points w/ a fit
for 4M or 3N to be odds on; and
c= ~27-28 playing points with a fit for 5m to be odds on