home *** CD-ROM | disk | FTP | other *** search
- INTRODUCTION
-
-
- Most currently popular American bidding systems have characteris-
- tics that adversely affect partscore bidding accuracy, close
- doubling of partscore contracts, and overtrick prevention. While
- these factors are of major importance in a matchpoint contest, they
- don't mean much with International Matchpoint (IMP) scoring,
- wherein the primary concern is the bidding of hard-to-reach but
- reasonable games and slams that the opposition may miss. Perhaps
- because of the greater prestige of IMP events, American systems
- cater more to IMP than to matchpoint goals. Besides, most players
- are too lazy to come up with different systems for matchpoints and
- IMP contests.
-
- Here are a few of the shortcomings of current systems in a match-
- point contest:
-
- -- Five-card major systems require that a minor suit as weak as 432
- (or even 32!) be opened when lacking five cards in a major, and
- major "suits" like 5432 are bid the same as AKQ2. The consequent
- reluctance to raise with three-card support means that good major
- suit partscores with 4-3 fits are seldom found (although bad ones
- sometimes are). Good minor suit partscores are also difficult to
- find. The result is an over-reliance on bidding notrump. While
- notrump contracts are desirable at matchpoints, superior suit
- contracts should not be overlooked.
-
- -- Bidding short and/or weak suits does not help partner to choose
- an opening lead, the most important play of all at matchpoint
- scoring. The practice is also detrimental for establishing "fit"
- for partscore (and game too, for that matter) bidding accuracy.
-
- -- After a five-card major opening, it is seldom possible to play
- a 1NT contract, a highly desirable matchpoint landing place.
-
- -- When not using weak notrumps, hands such as S-J832 H-AQ9 D-KJ3
- C-Q109 are opened with 1C, a bid that does nothing to describe the
- notrump nature of the hand. With notrump so important at match-
- points, notrump type hands should bid notrump.
-
- -- In systems using weak notrumps, 1NT openings are often required
- with hands that are more suit-oriented than notrump-oriented.
- Notrump bids should not be made with hands such as S-AK54 H-75
- D-864 C-AK32, yet some systems require a 1NT opening with this
- hand. If 1NT must be passed, there is likely to be a better suit
- contract. Isn't it better to bid clubs and spades, then let partner
- decide on a contract? Whether bidding offensively, doubling for
- penalties, or making an opening lead, partner cannot count on the
- 1NT bidder to really have a notrump type hand.
-
- -- "Big Club" systems take away the most valuable natural opening
- bid in matchpoint games. A 1C opening keeps the bidding low, avoids
- rebid problems, and is frequently useful for lead direction.
-
- -- It is often impossible to play a safe notrump contract when
- opener has a strong hand and responder is weak. The 2NT opening
- with 20 HCP and the jump rebid to 2NT with 18 HCP are overbids made
- necessary by other systemic requirements. One might say with IMP
- scoring, "As long as there is no game, who cares?" With matchpoint
- scoring, however, bidding the right partscore can earn a top.
-
- -- After a one-over-one response, the forcing nature of a reverse
- and subsequent repeat forces require either extreme underbidding
- or overbidding with some unbalanced 16-17 HCP hands. The forcing
- reverse arose out of the reluctance to raise a major suit response
- with three trumps and a good hand. The cure is worse than the
- disease at matchpoint scoring, because it becomes difficult to stop
- at a good partscore.
-
- -- Three-card minor suit openings allow the opponents to enter the
- bidding at a low level. They not only get into the bidding more
- easily and more accurately, but also may shut out major suit
- bidding space for the opening side. All sorts of gimmicks, such as
- negative doubles and support doubles, are needed to combat such
- interference. Accuracy in low-level business doubling is lost.
-
- Since it is unlikely that a bidding system can be designed to
- satisfy the needs associated with both types of scoring, it seems
- obvious that a partnership should use different systems for IMP and
- matchpoint scoring.
-
- The amBIGuous DIAMOND system is designed to satisfy matchpoint
- bidding requirements. It combines the advantages of real-suit
- bidding with the bidding of notrump with all notrump type hands
- (and only notrump type hands). It permits, nay, it features, four-
- card major opening bids.
-
- The author's book, Four-Card Majors, is a useful accompaniment to
- this book. It includes a more detailed comparison of the advantages
- and disadvantages associated with four-card major and five-card
- major opening bids.
-
- The amBIGuous DIAMOND system was published in the Contract Bridge
- Forum, November 1982, and again in April/May 1983. Either the
- editor was very much taken with the system, or was asleep at the
- switch.