A New
Framework in 2/1 gameforcing sequence
(cozofu)
Playing 2/1 gameforcing, many
players don't really have an agreement on
the further development once
responder makes a two over game forcing
response. It's neccessary to
understand the basic principle of two over one
gameforcing structure.
Instead of the traditional fast
arrival principle, two over one structure
provides a new slow arrival
principle. That means once the
2/1 gameforcing situation has
been set up, all unneccessary jumps show
extra and mild slam interest.
According to this first principle,
the following statements are all
induced from it.
1 a jump raise to opener's first
suit shows slam interest and demands
cuebid from partner. a
serious 3NT convention may apply here, so
3NT shows serious slam
interest, 4 level cuebids show minimum hand.
example: 1S-2C-2D-3S: slam
interest, inviting pd to cuebid.
2 a double raise to opener's
first suit shows mild slam interest,
denies side suit controls,
2/1 suit garantees a good 5 card suit.
example: 1S-2C-2D-4S. SAKxx
Hxx Dxx CAQJxx
3 a simple raise to opener's
first suit shows either a minimum hand or
a hand doesn't justify the
above biddings.
4 a jump rebid shows solid suit
and slam interest.
(partnership agreement may
also play it to show at most one trump
loser? This bid sets up
trumps and demands cuebid. serious
3NT also applies here.
example: 1S-2C-3S: SAKQJxx
HAxx Dxxx Cx
5 a double jump rebid shows
solid suit, denies serious slam interest.
(partnership may also play
it to show at most one trump loser)
this bid denies out side
aces. may have side suit K or stiff,
I recommend it denies two
side suit controls.
example: SAKQJxxx HQxx Dxx
Cx, 1S-2C-4S.
5 a two level rebid shows either
minimum or 6+ in suit.
6 a low reverse(reverse at 2
level) or a high reverse(new suit at 3 level)
shows extra value.
7 a jumpshift at 3 level is
splinter.
8 a 2NT rebid shows minimum,
balanced or 18-19, balanced.
9 a 3NT jump rebid shows 15-17,
balanced.(not good for 1NT opening)
10 a single raise shows either
extra value or good support with minimum hands
example: 1S-2C-3C: SAxxxx Hxx
Dxx CAKxx, the quality of c suit justifies the raise.
11 a 2NT rebid by responder is
just a relay, usually shows minimum hands or
strong balanced.
asking for more details.
opener can bid naturally at 3
level.
over 1S 2C 2S 2NT, 3 level
the other major shows
6 card major suit and extra
value.
12 a three level new suit by
responder shows extra value.
13 a three level rebid by
responder shows extra value.
14 a 3NT rebid by responder
shows 15-17, balanced.
15 a 4th suit bid is natural and
shows extra value.
within this framework, we now
may have a partnership agreement
on how to stop at 4 level minor.
When both sides show minimum, 4
level minor is passable:
1S 2D
2S 2NT(relay)
3D 4D(invitational)
1S 2D
2S 3D
4D(forcing! because 3D sets up
gameforcing sequence)
1S 2D
2S 2N(relay)
3C 4C(invitational)
1S 2D
2S 3C
4C(forcing! because 3C shows
extra)
1S 2D
2H 2N(relay)
3D 4D(invitational)
1S 2D
2H 2N(relay)
3C 4C(forcing! 4th suit by
declarer also shows extra)
1S 2D
2S 2N
3D 3S
4D (invitational, because 2NT
then 3S doesn't garantee extra)
1S 2D
2S 2N
3D 3H
4D(invitational, because 3H here
doesn't garantee extra, it shows
stopper in H and asking
partner if 3NT is possible.)
I have played this structure
with Greg Hinze, it works well.
the 2NT relay convention may
have some drawback in positional issue
for 3NT. However, the gain of
bidding space is great.
来自清华BBS
