## page was renamed from IMP/Precision/ImpresisePrecision ## page was renamed from IMP/ImpresisePrecision = IMP/ImpresisePrecision = <> 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? = summary = == Openig 1C == http://pfdubois.com/publish/ImprecisePrecision/OneClub.html === 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. == 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 <> 　　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?　 == 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♣!. == 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 == 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 == 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- == 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: