1. IMP/ImpresisePrecision
Contents
ここからたどるのがよい。 http://pfdubois.com/publish/ImprecisePrecision/index.html
http://pfdubois.com/publish/ImprecisePrecision/ImprecisePrecision.pdf
Imprecise Precision Release 8.0 Paul F. Dubois
http://pfdubois.com/publish/ImprecisePrecision/OneClub.html
transfer bid を多用する。
Warning The 2018 changes to the convention charts include the “Basic” chart, which will be used in ACBL events with a maximum of 750 MP or less, such as Gold Pairs. Under that chart the “transfer positive” responses to 1♣ openings (described here) are not allowed. You will play these bids (1♥ through 2♦) as natural.
ACBL Convention Charts20 November201 https://web2.acbl.org/documentlibrary/about/181AttachmentD.pdf
ACBLのUnder 750 MPは入門者クラス?
2. summary
2.1. Openig 1C
http://pfdubois.com/publish/ImprecisePrecision/OneClub.html
2.1.1. Response
There is one negative response, 1♦!(0-7, artificial). You will make this bid with less than a good 8 HCP.
Major suit two-level replies are basically preemptive but highly invitational:
- 2♥!, 2♠! six cards, semi-positive, highly invitational with 4-6 HCP concentrated in the suit.
- 2N! asks for shortness.
All other responses (“positive responses”) show 8+ HCP and are game forcing.
2.2. 1.3 Strong Hands (16+ HCP)
1♣!(artificial, strong, forcing, 16+ HCP)(page 12):
We open 1♣! with any hand with 16+ HCP, except16-17 point balanced hands. We also open 1♣! witha 15 HCP hand containing an excellent six-card suitand a stiff or void. 1♣! has no upper limit and absolutely may not bepassed. The system after this opening is covered in its own chapter,Opening One Club(page 12).
4441のstrong handsが抜けている。-- ToshinoriMaeno 2019-08-03 01:38:36
- 1C-1D-1H がH5を示すとしたときに、Sが1枚(1444)の手は適当なbidがない。2Cに含めるか?
2.3. 1.4 Balanced Hands
The system is basically the same with an NT rangeof 12-14 HCP or 14-16 HCP.
In the former case an opening of 1♢followed by an NT rebid shows thestronger hand, while in the latter it shows the weakerhand.
One must therefore remember that the NTrebid after 1♢ openers does not deny four spades; with invitational or better values, New Minor Forc-ing should be used to check for a spade fit if one ispossible.
Any balanced hand (with shape 4333, 4432, or 5332)is opened 1♢or 1N if it has the right number of HCP.
This includes hands containing a five card ma-jor, so we play 3♣! as Puppet Stayman after 1N ora notrump rebid.
Stronger balanced hands start with1♣!.
2.4. 1.5 Intermediate Hands (11-15HCP)
If opener opens in a suit, his hand is not balanced if he doesn’t rebid NT.
That means he either opened a 6+ card suit, or has a second 4+ card suit.
•1♢(as short as two, 11-15 HCP)(page 7)
- This bid isannouncedas possibly as short astwo cards. It helps to think of 1♢as betweena standard 1♣and 1♢.
We open 2♣! with six clubs.
- Opening 1♢ therefore shows four+ diamonds or five clubs,or a notrump hand. The notrump hand aside,we cannot have just 3 diamonds and 4 clubs orit would be a hand that could be opened 1N or1M.With values concentrated in the minors, or bal-anced, 11 HCP hands should be passed. Inpass-out seat this is a judgement call.
•1♡or 1♠(11-15 HCP)(page 6)
- Shows a five card major and a non-NT rebid.Because of the limited range, some responsesare not standard. In competition a double ornotrump rebid can be used to show no othersuitable bid available.
•2♣!(11-15 HCP, a six+ card club suit)(page 10)
- This bid requires six clubs. It may containa four- or even five-card major. However, inthird seat with five good clubs we sometimesopen 2♣! rather than open 1♢and rebid 2♣.
2D! (11-15HCP, 0 or 1 diamonds)
- The allowed shapes are 4=3=1=5, 3=4=1=5,4=4=1=4, 4=4=0=5.One way to remem-ber this is “4=4=1=5 missing one card some-where”. Another is “0 or 1 diamonds, no fivecard major, and no six card club suit”.
Note how these bids fit together. With 11-15 HCP, ifyou have five clubs, and no five card major, you areeither short in diamonds and should open 2♢! or canopen 1♢or 1N
2.5. 4.3 1D response
4.3 The One Diamond Response
After the weak 1♢(0-7 HCP) response, openermakes fairly natural bids designed to show hisstrength and shape. TheHeart Relay(page 13) al-lows us to show various strong balanced hands.
After 1♣! - 1♢!(0-7), opener’s rebids are:
- 1♡! (hearts or 20+ balanced) describes a hand which is usually a heart suit but may also be a 20-21 or 25+ HCP balanced hand; or rarely, is 6-5 in the minors.
See Heart Relay(page 13) for the continuations.
- If you choose not to play the Heart Re-lay, 1♡shows a five card heart suit, not forc-ing
1♠, 2♣, and 2♢show five card suits.
- Thesebids are non-forcing. If your hand has 8 tricks,do not make these bids.
1N!(16-19, balanced)
2♡! or 2♠! shows a strong hand with a 5+card major, like a standard 2♣opener followedby a 2M rebid.
2N shows a 22-24 HCP balanced hand. Sys-tems are on, 3♣is Puppet Stayman.
3♣and 3♢show very strong, unbalancedhands with a long minor suit.
3♡and 3♠set trump and show an extremelystrong hand (9 tricks). Trumps are long andsolid. Partner should cue-bid.
3N is to play based on a long solid suit.Responder’s second bid:• With 0-4, pass, especially if balanced, unlessyou have an Ace.
Over 1♡, the heart relay is on, see below.
- If not playing that, treat as with 1♠.
• Over 1♠, raise with 4-5 support points; jumpraise with 6 or 7. • Over 1N, systems are on; see Bidding Bal-anced Hands(page 4) for details
2.6. 4.3.1 Heart Relay
The Heart Relay is an optional part of the system. If it is not used, 1♡is treated the same as 1♠, above;
strong notrump hands are bid with 1♣-1♢-1N showing 18-19, a 2N opener showing 20-21, and 1♣-1♢-2N showing 22-24, 1♣-1♢-3N showing25-27.
After 1♣!-1♢!, 1♡! asks responder to bid an ar-tificial 1♠!.
- The opener will clarify his hand on hisnext bid.
It is usually a hand with hearts, but can bea strong balanced hand, and even more rarely a hand6-5 in the minors.
This bid should be explained as, “A five-card heartsuit or a strong balanced hand; or rarely, a hand 6-
2.7. 4441
positive responses for 1C
If a hand is not balanced and does not have a five-card suit, it is a 4441 hand. Such a hand is called a “rattlesnake”. The bids showing these hands come in two groups: