*** OKbridge Convention Card Format 2 ***
General Names:4 card major, Approach:2/1 forcing to 2NT or 3 level rebid
Notrump 3C:invititional, 2NT:20-22, 1NT:15-17, 3D:Invititional, Puppet
3H:5/5 M, inv, 3S:5/5 M, GF, Jacoby-Over-2NT
Texas-Over-2NT, System-On-Over:CAPP 2C & non pen x, 2NT-3S:MSS, Stayman
2D-Xfer-To-H, Texas, 3NT:to play, Smolen, 2H-Xfer-To-S
Lebensohl, Leb-Deny:direct, 2S:MSS, 1NT-2NT:Sign off in C or 4-4-4-1,GF
Majors Often-4-Cards-1&2, Often-4-Cards-3&4, Double-Raise-Limit
JR-In-Comp-Weak, 2NT-Conv-Raise, Jacoby 2NT, Splinters, 2NT-Forcing
Minors 1C-Shows-4+, 1D-Shows-4+, Double-Raise-Weak, JR-In-Comp-Weak
2NT-Invitational, 3NT-Desc:13-15, Note:invert Minor raise
2C Range:22+, Desc:22+ or 9 playing tricks, Strong
Resp:2H,double neg , 2D-Waiting
2D Range:6-11, Desc:weak 2, Resp:feature
2H Range:6-11, Desc:weak 2, Resp:Ogust
2S Range:6-11, Desc:weak 2, Resp:Ogust
OtherConv Two way New-Minor-Forcing, 4SF-To-Game, Note1:Strong Jump shift
western cuebid. Wolff sign off. leb
Doubles Negative, Negative-Thru:4H, Responsive, Responsive-Thru:3S
Overcalls Range:7-16, Often-4-Cards,
Preempts sound when vul
NT-Over Direct-Range:15-18, Systems-On, Balancing-Range:12-16
Vs.NT Case1-Vs:Strong NT, Case2-Vs:weak NT, 2C-Case1:C + higher suit
2C-Case2:one suiter, 2D-Case1:D + major, 2D-Case2:majors
2H-Case1:Majors, 2H-Case2:H + minor, 2S-Case1:weak sp suit
2S-Case2:S + minor, Dbl-Case1:one suiter, Dbl-Case2:penalty
Vs.Doubles NSF-1-Level, JS-Weak, 2NT/Majors-Limit+, 2NT/Minors-Limit+
Vs.Preempts Takeout-Doubles, Takeout-Dbl-Thru:4S, Lebensohl
Slam-Bids Gerber, 1430, DOPI-DEPO-Level:x:penalty, pass:1/4, add one level 0/3
Suit-Leads Xx, Xxxx, Xxx, Xxxxx, Akx, Tnx, Kqx, kJtx, Qjx, kTnx, Jtn
qTnx, Kqtn, Std-Carding, Odd-Even, 3/5
NT-Leads Xx, Xxxx, Xxx, Xxxxx, aKjx, aQjx, aJtn, aTnx, Kqjx, kQtn, kJtn
kTnx, Qjtx, qTnx, Jtnx, Tnxx, Std-Carding, Odd-Even
in some rare cases, opener may open 3 card minor.
4 card suit should be at least QTxx
always open the higher suit with 2 4-card suits. One exception: 4-4 majors, open
1H. unless huge disparity in S/H
1C- 1X-1M garantees 5-4 in C and M.
3 card raise to 1M should have at least Qxx and distributional bonus.
Notes on 4 card major convention card.
two level rebid after responder's two over one is
one round forcing.
immediate raise to opener's rebid suit is nonforcing.
responder may hold
SKJxx Hxxx DKQJx Cxx
implied pure 8 losers hand, no many side suit KQ.
opner can pass 3S with
SQTxxx HQJx Dx CAKJx
With extra value, responder need to jump
to four level as a cuebid to show good trump support, 6 losers.
It's no splinter.
SAQx Hxxx DKQJxx CAx
responder need to jump to 4C to show
his C control and good fit in spade,
usually should be CA, sometimes
can be second round control.
change responder's hand to
SAQxx Hxx DKQxxx CAx, he need to jump
to 3D and support spade later.
responder's new suit after opener's two level
rebid doesn't garantee 4 cards, but it usually garantees
honor in the suit and game forcing.
SAxx HKx DAKJxxx Cxx
SAx Hxx DAKJxxxx CKx
opener's 4th suit shows support in responder's
Sxx HAKxxx Dxx CKQJx
Sxx HAKxxx Dxx CKQJx
SAx Hxx DAKQJx CATxx
3S!(C fit) 4D(kick back)
5C(2 KC with Q) 5D(asking for K)
after opener's 2NT rebid,
new minor forcing applies here:
3D: three card D support.
3H: 4 card club suit, usually:
3S: 5-3-2-3 shape.
3NT: none of above.
3d: D support
3NT: none of above
3H: C support
3S: 5 spades,
3N: none of above.
responder's raise or rebid are nonforcing after
opener's 2NT rebid.
4 level new suit shows 5-5 two suiters and slam interest.
Sxx HAQxxx DA CKQxxx
opener's 4NT is to play.
other bids are cuebid.
4H is to play as well.
after 1S 2H
3H is nonforcing, usually 7 losers
4 level new suit shows control, extra value and good support in H, usually 5 losers.
3 level new suit then 4H, implies the other suit is short, can have 3 card support,
good 6 losers.
raise to 4 level shows normal 6 losers hands.
2S then 4H shows good spade suit, H support, good control, 6 losers.
SAKxxx HAQxx DKx Cxx
SQJ HKJxxx DAQJx Cxx
4D shows D honor,
5H asks for C control.
pass denies C control.
SAxxxx HAxx DKQJx Cx
SKx HKQJxxx DAxx Cxxx
4C(delayed H support) 4D(cue, slam interest)
4S(kick back) 5H(two KC with Q)
Here, the opener can't bid 4H, which shows doubleton support in H.
SAKxxx HAQxx DKxx Cx
Sx HKJxxxx DAQJx Cxx
after 4D, responder knows the hand fits well, but
he need to know whether the opener has C control.
so 5H is asking for C control.
the opener bid the slam happily.
SAKxxxx HAxx DKxx Cx
Sxx HKQJxxx DAx CAxx
4C 4S(kick back)
because of 3H rebid, the opener can't bid 4H as delayed
support. he has to cue bid 4C to show his hand.
SKQJxxx HAxx DAx Cxx
SAx HKQJxxx Dxx CKx
4D 4S(kick back)
4D shows D control, delayed support in H, good 6 losers hand,
good spade suit, usually no singleton.
sometimes, you may find some magic slam:
SAQJxxx HKxx Dxx CAx
SKx HAQJxxx Dx Cxxxx
4C is delayed H support. 4S kick back.
I just don't think there is any feasible way to find this
slam in 2/1 structure.
sequence after 1M-2m
immediate raise is forcing, shows <=6 losers hand, usuall at least
4 card support,
can be three with very strong support.
super fit, at least 5-5 two suiters and exactly 5 losers hand.
SAKxxx Hx DAx CKxxxx
Sxx HAxx DQxx CAQxxx
4N(cuebid in D) 6C
7C should have no good play, because pd has 5 losers.
change DQ to SQ, it would be another story, since SQ would be a cover card.
4 level jump shift:
they are no kickback, if one wants to check key card,
he need to raise to 3C then bid kickback suit.
4D and 4H should be ERKC.
SAKQxx H- DKxx CAxxxx
Sxx HQxx DAxxx CKQxx
7C(a little bit aggressive, but it has some play)
3m is sign off.
nmf is on.
3H(D support)/3S(5th spade)
3NT none of above.
shows 18-19, balanced hand.
SAKxx HKxx DQxx CAKx
Sxxx HAxx DAKxxx Cxx