Mijumaru Blue Club
Welcome to Mijumaru Blue Club! This bidding system is largely based on Blue
Club. Changes are made with my improvisation.
We use the distribution syntax and abbreviations provided by WBF.
http://www.worldbridge.org/wp-content/uploads/2017/04/Guidetocompletion.pdf
The ACBL convention card of this system is at
https://bridgewinners.com/convention-card/print/mijumaru-blue-club/99274
Notable differences from the original Blue Club
Strong opening auctions are one point lower.
-
1
♣
: 16+ HCP (17+ balanced)
-
Reverses: 14–15 HCP
The 1NT opening is 14–16 HCP to fit the ranges above. Modern 3-point ranged
strong notrump works better than a weak or wide-ranged one.
The precedence for opening a 4-card suit is
♥
>
♠
>
♦
. Opening 1
♥
for 44
in majors provides better constructiveness.
We don't care about suit quality in constructive bidding. Responder does not
consider 3-card suits as biddable.
We use natural 2/1 over 1
♦
♥
and swapped 2/1 over 1
♠
.
The responses to 1
♣
are natural Polish-like instead of control-showing. MAFIA
applies to minimum game force.
References
-
Jan Eric Larsson.
Good, Better, Best: A comparison of bridge bidding
systems and conventions by computer simulation.
ISBN 978-1771402415
-
Daniel Neill.
Standard Modern Precision: Getting from Here to There.
ISBN
978-1771401791
-
Jan Eric Larsson, Anu Uus, and George Wang.
[Kaninklöver / Cottontail Club: A Cheatsheet (2022)](https://github.com/Egroegw/Kaninklover)
-
Bo-Yin Yang.
[Terrorist's Moscito, or Major-Oriented Strong Club, with Interpid Two Openers](https://bridgewithdan.com/wp-content/uploads/2022/01/terr_mosc.pdf)
-
Arturo Franco, Marco Pancotti, and Daniel J. Neill.
[Blue Team Club](https://bridgewithdan.com/wp-content/uploads/2019/07/BTC2000_gmeier.pdf)
-
Edward Piwowar.
[PC - Meckwell Lite Precision Club](https://sites.google.com/view/bbaenglish/description-of-systems/pc-meckwell-lite-precision-club)
Hand evaluation
-
High card points (HCP)
: the well-known Milton Work's 4321 count
-
Total points
: HCP + distribution points (void = 3, singleton = 2, doubleton
= 1, subtract 1 for each short suit with HCP)
-
Zar points (ZP)
: 6-4-2-1 + Zar distribution points (a + b + a - d, where the
letters are the number of cards from the longest to the shortest suit)
-
Fifths
: 4.0–2.8–1.8–1.0–0.4, adjusted HCP for notrump contracts
especially 3NT
-
BUM-RAP
: 4.5–3–1.5–0.75–0.25, adjusted HCP for suit contracts
-
NLTC
: Count 1.5–1.0–0.5 losers for each missing AKQ
NLTC is a good single hand evaluator but not very additive. It suits
preemptive initial actions but not for showing supports. I have a blog article
on that topic.
https://jdh8.org/nltc-a-good-single-hand-evaluator/
Stopper
We evaluate stopper quality as GIB does.
-
Partial stop
: length + HCP = 4
-
Likely stop
: length + HCP = 5
-
Stop
: A, QJx, or length + HCP at least 7
-
Two stops
: length + HCP at least 8
References
-
Thomas Andrews. [Thomas's Bridge Fantasia](https://bridge.thomasoandrews.com/valuations/)
-
Bridge Base. [GIB Bid Descriptions](https://www.bridgebase.com/doc/gib_descriptions.php)
Opening bids
-
∅
-
-
1
♦
|
4+
♦
or 3334, 11–15 HCP
|
-
-
-
1NT
|
2–4
♠
, 2–4
♥
, 2–5
♦
, 2–5
♣
, 14–16 HCP
|
-
2
♣
|
!NAT, 5+
♣
, 11–16 HCP
|
-
-
2
♥
|
PRE, 5+
♥
, 4+X, 4–10 HCP
|
-
2
♠
|
PRE, 5+
♠
, 4+m, 4–10 HCP
|
-
2NT
|
!UNT, 5+
♦
, 5+
♣
, 4–10 HCP
|
-
-
3NT
|
!Gambling, SOL 7+m, 0–1 outside A/K
|
-
4
♣
|
!PRE, S-SOL 8+M, 0–1 outside A/K
|
-
4
♦
|
!PRE, SOL 8+M, no outside A/K
|
-
-
4NT
|
!UNT, 6+
♦
, 6+
♣
, 10–16 HCP
|
Note that we don't open 11 HCP balanced hands. Unlike aggressive sibling
systems, we keep our opening range narrow for easier responses.
Choice of suit openings
Contrary to popular belief, a modern Blue Club is pretty natural.
-
Bid the longest suit
-
Bid the higher-ranking suit but choose 1
♥
for 44 in majors
Canapé
Sometimes we open the secondary suit on purpose. We canapé for maximum
non-club two suiters, planning to reverse in the primary suit later.
-
14–15 HCP
-
At least (54) in two of
♠
♥
♦
There is also canapé for minimum 4M5
♣
. We open 1M so that 4M5
♣
hands in the
2
♣
opening are strong enough for the 2
♦
relay.
-
12–13 HCP
-
>= 7.0 NLTC
-
A 4-card major and 5 clubs
The notrump ladder
-
11–13
: 1
♦
♥
♠
or 2
♣
-
14–16
: 1NT
-
17–19
: 1
♣
-1
♦
-1NT
-
20–22
: 1
♣
-1
♦
-1
♥
-1
♠
-1NT
-
23–24
: 1
♣
-1
♦
-1
♥
-1
♠
-2NT
-
25+
: 1
♣
-1
♦
-2NT
Strong 1
♣
opening
We use Polish style responses to the 1
♣
opening. These responses are
derived from
canapé style
in "PC - Meckwell Lite Precision Club" by
Edward Piwowar:
https://sites.google.com/view/bbaenglish/description-of-systems/pc-meckwell-lite-precision-club
-
1
♣
-
-
-
-
1NT
|
FG, 2–3
♠
, 2–3
♥
, 2–5
♦
, 2–5
♣
|
-
2
♣
|
FG, 5+
♣
, 0–3
♠
, 0–3
♥
|
-
2
♦
|
FG, 5+
♦
, 0–3
♠
, 0–3
♥
|
-
-
-
2NT
|
S/T, 2–3
♠
, 2–3
♥
, 2–5
♦
, 2–5
♣
, 11–13 HCP
|
-
-
-
-
-
-
-
-
4
♥
|
PRE, 7+
♥
4–7 HCP or 8+
♥
0–7 HCP
|
-
4
♠
|
PRE, 7+
♠
4–7 HCP or 8+
♠
0–7 HCP
|
These exactly 4-card 1M responses are canapé style, i.e. there can be a longer
side suit. With (54) in majors, we usually bid the 4-card major first.
However, with a 45(xx) mild slam try (11–13 HCP), we bid 2
♥
and then rebid
3
♠
.
Negative 1
♦
response
-
1
♣
-1
♦
-
-
-
1NT
|
BAL MIN, 17–19 HCP, 2–4
♠
, 2–4
♥
, 2–5
♦
, 2–5
♣
|
-
-
-
-
-
2NT
|
!FG, 2–5
♠
, 2–5
♥
, 2–5
♦
, 2–5
♣
|
-
-
-
-
-
3NT
|
!FG, 0–2
♠
, 0–2
♥
, 5+
♦
, 5+
♣
|
-
1
♣
-1
♦
-1
♥
-
-
-
2
♣
|
!MAX, 5–7 HCP, 0–1
♠
, 0–4
♥
|
-
2
♦
|
!MAX TRF, 5–7 HCP, 5+
♥
|
-
-
-
-
1
♣
-1
♦
-1
♥
-1
♠
-
1NT
|
BAL, 20–22 HCP, 2–4
♠
, 2–4
♥
, 2–5
♦
, 2–5
♣
|
-
-
-
-
2
♠
|
!FG, 4+
♠
, 4+
♥
, not BAL
|
-
2NT
|
BAL, 23–24 HCP, 2–4
♠
, 2–4
♥
, 2–5
♦
, 2–5
♣
|
-
-
-
3
♥
|
!FG, (41)44 or (40)(54)
|
-
3
♠
|
!FG FRAG, 3=
♠
, 0–1
♥
, 4–5
♦
, 4–5
♣
|
-
3NT
|
!FG FRAG, 0–1
♠
, 3=
♥
, 4–5
♦
, 4–5
♣
|
-
1
♣
-1
♦
-1
♠
-
-
-
-
2
♥
|
!MAX NF TRF, 5–7 HCP, 5+
♠
|
-
2
♠
|
!MAX, 5–7 HCP, 5+
♠
, 3=
♥
|
-
-
3
♣
|
!MAX, 5–7 HCP, 5+
♣
, 3=
♥
|
-
3
♦
|
!MAX, 5–7 HCP, 5+
♦
, 3=
♥
|
-
-
-
3NT
|
!Choice of games, 3433
|
-
-
-
Positive 2M responses
The 2M responses are game-forcing and show 5+ cards. Except 45(xx) mild slam
try, the other major is not exactly 4 cards.
Over 1
♣
-2
♥
, things are pretty natural. Over 1
♣
-2
♠
, however, bidding 3
♥
would be too high if we want to find both 5-3 and 6-2 fits. Therefore, we swap
the meanings of 3
♣
and 3
♥
.
-
1
♣
-2
♥
-
-
2NT
|
1–3
♥
, 2–4
♠
, 2–5
♦
, 2–5
♣
|
-
-
-
-
1
♣
-2
♠
-
2NT
|
1–3
♠
, 2–4
♥
, 2–5
♦
, 2–5
♣
|
-
-
-
-
-
1
♣
-2
♠
-3
♣
-
3
♦
|
!(R), 2+
♥
, 10–11 HCP or 8.0 NLTC if 3+
♥
|
-
-
-
-
4
♣
|
!S/T over non-serious SPL
♦
|
-
4
♦
|
!Non-serious SPL, 0–1
♣
|
-
4
♦
|
!S/T over non-serious SPL
♣
|
-
4
♣
|
!Serious SPL, 0–1
♣
, 3+
♥
|
-
4
♦
|
!Serious SPL, 0–1
♦
, 3+
♥
|
-
4
♥
|
!S/T, 3+
♥
, 12–13 HCP or 7.5 NLTC
|
With heart support over 1
♣
-2
♠
-3
♣
, there are several ways to reach 4
♥
. In
general, we want to cede declarership with a weak hand, so we assign weaker
support to bids with higher transfer rate. However, we can also reuse the
weakest forcing bid for strong hands (~2+ tricks above minimum) to save bidding
space.
-
3NT
: Minimum game force (8–9 HCP or 8.5 NLTC), non-serious Splinter (~
8–10 HCP), or strong slam try (14+ HCP or 7.0− NLTC)
-
3
♦
: 10–11 HCP or 8.0 NLTC
-
4
♥
: 12–13 HCP or 7.5 NLTC
-
4
♣
♦
: Serious Splinter (~ 11–13 HCP)
The 3M rebid sets the trump suit. If opener wants a choice of games, bid 2NT
instead.
-
1
♣
-2M-3M
-
1step
|
!ART, 8–9 HCP or 8.5 NLTC
|
-
2steps
|
!ART, 10–11 HCP or 8.0 NLTC
|
-
3steps
|
!ART, 12–13 HCP or 7.5 NLTC
|
-
4steps
|
!ART, 14–15 HCP or 7.0 NLTC
|
-
-
6steps
|
!RKCB 0314, 16+ HCP or 6.5− NLTC
|
Competitive bidding
The strong club is fertile ground for bidding gadgets and psychic bids. We
ignore the meaning of overcalls in the first round for simplicity. Dealing
with just the nominal overcall also serves as a countermeasure against psychic
bids.
The following bidding structure is derived from Terrorist's Moscito. I changed
our natural 1M responses to exactly 4 cards.
-
It makes more sense to bid 4 cards at 1-level and 5+ cards at 2-level.
-
This also fits in our constructive bidding structure.
-
1
♣
-(1X)
-
-
-
-
2NT
|
!TRF, PRE 7+
♣
or MIN FG SOL 6+
♣
|
-
3
♣
|
!TRF, PRE 7+
♦
or MIN FG SOL 6+
♦
|
-
3
♦
|
!TRF, PRE 7+
♥
or MIN FG SOL 6+
♥
|
-
3
♥
|
!TRF, PRE 7+
♠
or MIN FG SOL 6+
♠
|
-
3
♠
|
!Gambling, SOL 7+ suit without stopper
|
-
3NT
|
!Gambling, SOL 7+ suit with stopper
|
As for (X), we use a similar approach to (1
♦
).
-
1
♣
-(Dbl)
-
-
1
♦
|
F, 4+
♦
, possibly MIN 5=M
|
-
-
-
-
-
-
-
-
2NT
|
!TRF, PRE 7+
♣
or MIN FG SOL 6+
♣
|
-
3
♣
|
!TRF, PRE 7+
♦
or MIN FG SOL 6+
♦
|
-
3
♦
|
!TRF, PRE 7+
♥
or MIN FG SOL 6+
♥
|
-
3
♥
|
!TRF, PRE 7+
♠
or MIN FG SOL 6+
♠
|
-
3
♠
|
!Gambling, SOL 7+ suit without stopper
|
-
3NT
|
!Gambling, SOL 7+ suit with stopper
|
Competing over (1NT) is quite straightforward.
-
1
♣
-(1NT)
-
Dbl
|
INV+, 5+ HCP, fairly BAL
|
-
-
-
-
-
2NT
|
!FG CUE, usually 5+X 5+Y
|
-
-
-
-
-
3NT
|
!Gambling, SOL 7+ suit
|
The nature of 1
♣
-(2X) is similar to 1NT-(2X), yet there are some differences.
We use plain Rubinsohl instead of Transfer Lebensohl here. The 1
♣
opener is
unlimited and perhaps unbalanced. Preempting with a long suit is no longer
a good idea:
-
The preemptive value is overvalued due to a probable misfit.
-
Opener can bid again with extra values.
[TODO: actual continuations over 1
♣
-(2X)]
The 1
♦
opening
-
1
♦
-
-
-
-
2
♣
|
!F, 6+M 3–9 HCP or FG 0–3
♠
0–3
♥
|
-
-
2
♥
|
!P/C, 4+
♥
, 5+
♠
, 7–9 HCP
|
-
2
♠
|
!TRF INV+, 6+
♣
, 10+ HCP
|
-
-
3
♣
|
!Mixed raise, 5+
♦
, 7–9 HCP
|
-
3
♦
|
INV, 5+
♦
, 10–11 HCP
|
-
-
-
Major suit openings
Unlike most strong club systems, we play 2/1 FG here. Since the 2NT response
is conventional, the wide-range 1NT must include invitational hands. Most of
the time, 1NT is a decent contract for a minimum opener. F2NT would miss the
chance to stop at 1NT.
-
1
♥
-
-
-
-
-
-
-
-
-
-
-
-
3NT
|
!Choice of games, 3(433), 12–15 HCP
|
-
-
-
We swap 2
♣
and 2
♥
over 1
♠
, inspired by Twisted 2/1 by Ting-Yu Ye (TpKotoba).
https://hackmd.io/@TpKotoba/refx
When there are 5 hearts in 1
♠
-1NT, it must be an invitation without a spade
fit.
-
1
♠
-
1NT
|
NF, 0–3
♠
, 0–5
♥
, 8–11 HCP
|
-
2
♣
|
! 5+
♥
8+ HCP or FG 4+
♥
, but not INV 5=
♥
|
-
-
-
-
-
-
-
-
-
3NT
|
!Choice of games, (4333), 12–15 HCP
|
-
-
-
1
♠
-2
♣
-
2
♦
|
!(R), MIN 4–5
♠
0–1
♥
or MAX 5+
♠
3+
♥
|
-
-
-
-
-
-
-
-
Natural invitational 2/1 by passed hand
Strong notrump opening
We use the French-style 4-way transfers to preserve the natural invitation. We
invite naturally rather than via Stayman because 2NT hides information of the
declarer.
The responder tries to show a major first always (MAFIA). The only exception
is not to bid Stayman with (4333), a hand so flat that playing notrump is a
better idea.
-
1NT
-
2
♣
|
!STAY, may be Garbage
|
-
-
-
2
♠
|
!TRF, 6+
♣
or S/T 4+
♦
4+
♣
|
-
-
-
3
♦
|
!Choice of games, 5+
♠
, 5+
♥
|
-
3
♥
|
!SPL, 0–1
♥
, 2–3
♠
, 4–5
♦
, 4–5
♣
|
-
3
♠
|
!SPL, 0–1
♠
, 2–3
♥
, 4–5
♦
, 4–5
♣
|
-
-
4
♣
|
!Gerber, ask for aces
|
-
-
-
-
-
Stayman
Excluding opener's 5-card majors, the Stayman has its traditional meaning or a
Garbage Stayman.
-
INV+, unspecified 4+M
-
WK, 4=
♠
, 4=
♥
, 4–5
♦
, 0–1
♣
The Garbage Stayman takes advantage of that opener will eventually rebid within
2
♠
♥
♦
, so we can bid 2
♣
as a weak takeout of clubs and pass in the next round.
-
1NT-2
♣
-2X
-
Pass
|
WK, 4=
♠
, 4=
♥
, 4–5
♦
, 0–1
♣
|
We only employ Smolen transfers at the 3-level. The 2-level invitations are
natrual so that we have a chance to stop at 2
♥
.
-
1NT-2
♣
-2
♦
-
-
-
-
-
-
3
♥
|
!FG, Smolen TRF, 54(xx)
|
-
3
♠
|
!FG, Smolen TRF, 45(xx)
|
-
-
4
♣
|
!Gerber, ask for aces
|
-
4
♦
|
!Texas TRF, 6+
♥
, 4+
♠
|
-
4
♥
|
!Texas TRF, 6+
♠
, 4+
♥
|
-
-
The step of 1NT-2
♣
-2
♥
-2
♠
allows us to always choose the better major fit.
This is why the opener rebids 2
♥
with 44 majors.
-
1NT-2
♣
-2
♥
-
-
-
3
♣
|
FG, 5+
♣
, 0–3
♥
, 4=
♠
|
-
3
♦
|
FG, 5+
♦
, 0–3
♥
, 4=
♠
|
-
-
3
♠
|
!S/T, 4+
♥
, 2+
♦
, 2+
♣
|
-
-
4
♣
|
!S/T SPL, 0–1
♣
, 4+
♥
|
-
4
♦
|
!S/T SPL, 0–1
♦
, 4+
♥
|
-
-
4NT
|
QUANT INV to 6NT, 0–3
♥
|
-
5NT
|
QUANT INV to 7NT, 0–3
♥
|
-
1NT-2
♣
-2
♠
-
-
3
♣
|
FG, 5+
♣
, 0–3
♠
, 4=
♥
|
-
3
♦
|
FG, 5+
♦
, 0–3
♠
, 4=
♥
|
-
3
♥
|
!S/T, 4+
♠
, 2+
♦
, 2+
♣
|
-
-
-
4
♣
|
!S/T SPL, 0–1
♣
, 4+
♠
|
-
4
♦
|
!S/T SPL, 0–1
♦
, 4+
♠
|
-
-
4NT
|
QUANT INV to 6NT, 0–3
♠
|
-
5NT
|
QUANT INV to 7NT, 0–3
♠
|
Jacoby transfer
The opener always accepts Jacoby transfers. We super-accept with maximum and 4
trumps. We
hide
the doubleton just below the trump to avoid retransferring
problems like 1NT-2
♦
-3
♦
!-3
♥
?.
-
1NT-2
♦
-
-
-
-
-
-
-
-
-
-
-
4
♥
|
Mild S/T, 6+
♥
, 2+
♠
, 2+
♦
, 2+
♣
|
-
-
-
-
-
-
-
1NT-2
♥
-
-
-
-
-
-
-
-
-
-
-
4
♠
|
Mild S/T, 6+
♠
, 2+
♥
, 2+
♦
, 2+
♣
|
-
-
-
-
-
-
Seeking a major fit
There are apparent overlaps between major fit seeking conventions, especially
Jacoby transfers with Stayman or Texas transfers. This section describes how
to pick the best response.
Major two suiter, (54)+
To find the better fit, we consider the length difference between majors in our
partnership. The opener's difference is at most 2, so our basic strategy is
-
Same lengths
: let partner decide
-
Difference 1–2
: proactive negotiation
-
Difference > 2
: ignore the shorter suit
However, with a weak hand, it is more important to keep the bidding low. We
transfer to our longer major and then pass.
Same lengths, 55+
We choose the hearts from a weak two suiter for a chance to run out to 2
♠
unless spades are sufficiently better.
-
Weak
= 2
♦
(→
♥
); then pass
-
Invitational
= 2
♦
(→
♥
); then 2
♠
-
Choice of games
= 3
♠
-
Forcing to game
= 2
♥
(→
♠
); then 3
♥
Difference 1–2, (54)+
-
Weak
= transfer to the longer major
-
Invitational+
= Stayman
Major single suiter, 6+
-
Weak
= Jacoby; then pass
-
Invitational
= Jacoby; then 3M
-
Game but no slam
= Texas; then pass
-
Mild slam interest
= Jacoby; then 4M
-
Strong slam try
= Texas; keep bidding
Minor transfer
With an invitation or a game force without slam interest, we only show minor
suits with a singleton or void.
We use fragment bids instead of Splinters here to avoid lead-directing doubles.
-
1NT-2
♠
-
2NT
|
!INV, 4+
♣
or MAX 3+
♣
|
-
Competitive bidding
Competition does not affect auctions at 3NT and above.
-
1NT-(2X)
-
-
4
♣
|
!Gerber, ask for aces
|
-
-
-
Over (Dbl)
We keep things simple over a strong double (10+ HCP). Everything is natural.
Over (2
♣
)
We play
systems on
over 1NT-(2
♣
). Most bids keep the same meaning. This is
because 2
♣
is so low that we can treat it as (mirrored) (1
♣
)-1NT.
-
If there is no anchor suit, we completely ignore the 2
♣
bid.
-
With one anchor suit X, we treat it as (1X)-1NT, where
systems on
also
applies.
-
With a major and a minor anchor suits, we ignore the minor suit.
-
1NT-(2
♣
)
-
Dbl
|
!STAY, may be Garbage
|
-
-
-
2
♠
|
!TRF, 6+
♣
or BAL INV
|
-
We recommend Leaping Michaels over a sole anchor suit. Take natural clubs for
example.
-
1NT-(2
♣
)
-
3
♣
|
!INV+, 6+
♦
, at most partial stop in
♣
|
-
-
-
The real headache is when (2
♣
) shows both majors e.g. Landy. We recommend
reverse unusual vs. unusual.
-
1NT-(2
♣
)
-
Dbl
|
Suggest penalizing either major
|
-
-
-
-
-
-
-
-
Note that we pass when we can penalize both majors. A delayed double is for
penalty since a takeout can usually penalize the other major.
Over (2
♦
♥
♠
)
We play Transfer Lebensohl against overcalls 2
♦
♥
♠
.
-
1NT-(2
♦
)
-
-
-
-
-
3
♦
|
!FG, 5+
♣
, at most partial stop in
♦
|
-
3
♥
|
!FG, 5+
♥
, likely stop in
♦
|
-
3
♠
|
!FG, 5+
♠
, likely stop in
♦
|
-
3NT
|
!FG, 5+
♣
, likely stop in
♦
|
-
-
-
-
-
-
3NT
|
S/O, likely stop in
♦
|
-
1NT-(2
♥
)
-
-
-
-
-
-
3
♥
|
!FG, 5+
♣
, at most partial stop in
♥
|
-
3
♠
|
!FG, 5+
♠
, likely stop in
♥
|
-
3NT
|
!FG, 5+
♣
, likely stop in
♥
|
-
-
-
-
-
-
3NT
|
S/O, likely stop in
♥
|
-
1NT-(2
♠
)
-
-
-
-
-
3
♠
|
!FG, 5+
♣
, at most partial stop in
♠
|
-
3NT
|
!FG, 5+
♣
, likely stop in
♠
|
-
-
-
-
-
-
3NT
|
S/O, likely stop in
♠
|
Over (2NT)
We have a special unusual vs. unusual structure over 1NT-(2NT) because we have
not yet shown a suit.
-
1NT-(2NT)
-
Dbl
|
INV+, 2–4
♠
, 2–4
♥
, 2+
♦
, 2+
♣
|
-
-
-
-
The 2
♣
opening
Our 2
♣
opening is heavily influenced by Precision Club and Polish Club.
-
2
♣
-
-
-
2NT
|
MIN, 5=
♣
, 1–3
♠
, 1–3
♥
|
-
3
♣
|
MIN, 6+
♣
, 0–3
♠
, 0–3
♥
|
-
3
♦
|
!MAX, 6+
♣
, 0–3
♠
, 0–3
♥
|
-
-
-
-
-
-
-
2
♣
-2NT-3
♣
-
-
3NT
|
Choice of games, 4+
♣
|
Multi 2
♦
Our Multi 2
♦
shows a 6-card weak two of either major.
Exactly 5-card weak twos
Weak twos in this bidding system show exactly 5 cards in the bid major and an
unspecified suit. Multi 2
♦
already takes care of 6+ cards.
Non-jump new suits are non-forcing because sometimes we need to escape from a
certain misfit. With a strong misfit and a lower-ranking suit, we tend to buy
3NT with a minor suit. Otherwise, we go through 2NT and try to introduce
hearts in the next round.
Unusual 2NT opening
The unusual 2NT opening is a preempt with 55+ in minors.
We advise against opening 2NT for (30)55 in the first two seats.
-
2NT
-
-
-
-
-
-
-
4NT
|
!Equal preference between 5
♣
♦
|
-
2NT-3
♠
-3NT
-
-
-
5
♣
|
!S/T, 3+
♣
, voluntary bid
|
-
5
♦
|
!S/T, 3+
♦
, voluntary bid
|
BTU 4-level preempts
In National Taiwan University Bridge Club (BTU), we use a 4X scheme that
conveys approximately 0.58 more bits than traditional or Meckwell Namyats.
-
4
♣
: solid major suit without any outside A/K
-
4
♦
: semi-solid major suit with 0–1 outside A/K
-
4M
: non-solid (1.5+ NLTC) major suit
-
4
♣
-
-
-
4NT
|
!MAX, CTRL in every side suit
|
-
5m
|
!MAX, no CTRL in this suit
|
-