Post by Lorne AndersonPost by David GoldfarbPost by PlayerImps all Green
You are playing with a player who does not play any form of checkback.
1C (P) 1S (P)
1NT (P)
1NT shows 12-14
KTxxx
Jx
Kx
ATxx
Assume that 3C would be game forcing.
I wouldn't assume that, since it is a limit raise. The limit raise
would be ideal with your black suits reversed. Then you have no
interest in a spade games, but some interest in 3NT and 5C and want
to play in clubs if not game.
"Standard" seems to be almost unplayable. Everything below 2NT is to
play. 2NT and 3C are only invitational, and usually result in finding
the wrong partscore. You never want to play in 2NT, since if partner
has 3 spades then 2S is better and 3S is just as good, while if partner
has 2 spades then he has 4+ clubs so 2C is better and 3C is just as
good. If you bid 3C or even 2C, partner will surely have 3=4=3=3
shape.
Since invitations usually find the wrong partscore and the scoring is
imps in a weak field, I want to bid all 40%+ games even not vulnerable
and they turn out to be 25%, I just force to game. The only game
forcing bids seems to be 3D and 3H, with 3D possibly artificial. So
I bid 3D. This is not ideal, but perhaps the opponents will help by
doubling or not doubling it when partner's diamonds are weak or the
diamond K is offside. If the auction develops badly then I might pass
3S or run from 3NT(X) to 4/5C(X).
I was going to bid 2D (forcing since it is a new suit) until I checked
how bad "standard" is. Even if this is not agreed and NMF (new minor
forcing, and also artificial), it might be artificial for the same
reasons that 3D is -- the system is so unplayable that it hs no natural
or agreed conventional way to force. "Standard" has many such explicit
and implicit artificialities like 4th suit forcing, fake reverses, and
jump shifts in fake suits.
Post by Lorne AndersonPost by David GoldfarbI would bid 2N but if partner signs off in 3S ...
Not playing checkback, surely 3S over 2N is forcing? The message is
"I accept your invitation and show you my three spades in case you
have five and prefer the 5-3 fit." If partner has a minimum, partner
passes 2N.
When I posted I did not think it through (partly because I have no
memory of ever playing without checkback) but obviously you do not know
if partner has 4 or 5 spades and it makes no sense to bid on unless you
have enough for 3N when partner has only 4 spades.
Indeed, all of partner's bids except possibly 3C must show extras. 3D,
and 3H might show spade support and something about club length or
stoppers, but that would take agreements and tell the opponents a lot.
Perhaps use it only at matchpoints, for stopping in 3S on unsuitable
extras, or better use it to choose between 3S and 3NT with 5-3 spade
fits.
Bruce