The Auby-Diamond is a system  that was designed for playing only when non-vulnerable. This system was developed and is attributed to Mr. Daniel Auby of Vallentuna, Sweden. Mr. Daniel Auby was born in the year 1955 and died in in the year 2007.

Tribute to Daniel Auby

A tribute to the contributions of Mr. Daniel Auby was authored by Laila Leonhart in memory on Swan Games, which also appears on the website of the Swedish Bridge Federation. A remembrance is also authored by Mr. Tomas Brenning on the website of Swan Games, and is presented in English. This remembrance is also preserved and archived on this site in .pdf file format for future reference.

The idea behind the concept was to play the Auby Diamond by a non-vulnerable game and whenever the partnership was vulnerable, then the partnership would play according to the guidelines of the Magisk Carotti.


Explanation of the Author

Note: The following quote is by Mr. Daniel Auby:

The designing of the system obviously included close examination of what may be played under the Swedish system regulations and naturally it has 8 dots, which is the maximum allowed. Under Mr. Daniel Auby's latest proposal for new system regulations it will however only have 4 dots, thus perhaps I should switch to the nice Auby-ruter if the system board goes ahead with its proposed new regulations which will make both Magisk Carotti and Lands lags-standard forbidden.

Note: The Swedish Bridge Federation, in designing the system regulations, proposed the introduction of dots as a measurement for allowing or prohibiting certain bidding methods or approaches. As with all sponsoring bridge organizations such measurements change or are altered over time.

Fast Approach

The system is based on the Fast Approach, which means that the partnership exchange as much information as quickly as possible to judge or determine the possible level of all contracts. The responses are based on the information provided mainly by the first opening bid, or even first overcall, and show either only partscore interest, game interest, or slam interest.

For the original concept in Swedish a presentation has been only preserved and archived on this site for future reference in a .pdf file format. Source.

The original version as presented in the Swedish language does not include any defined bids above 2 Spades.

Bid Description Responses
Pass: 0-5 or 16+ 1 0-7(8), 1 19+, other is natural 8-18 (5-card suit-bids). After 1 opener pass with 0-5 or proceeds according to Magisk Carotti. Continuations after 1 is also according to Magisk Carotti.
1 : 11-15 unbalanced/13-15 balanced 1 0-9(10) or 13+. 1NT 11-13, suit bids are "openings" 10-14
1 : 5-8 (semi)balanced All bids are to play except 2 NT that is invitational and 1M that is forcing best Major.
1/ 1: 6-10, 4+, longer Minor possible Continuations according to Magic Diamond / Carrotti / Magisk Carrotti
1 NT: 9-12 (semi)balanced
2/ 2: 6-10, 5+, no 4-card Major Continuations according to Magic Diamond / Carrotti / Magisk Carrotti
2/ 2: 6-10, 5-5 in M + m Continuations according to Magic Diamond / Carrotti / Magisk Carrotti
2 NT: 9-12 (semi)balanced Yes, with 9-12 you may chose between 1 NT and 2 NT...
3-of-a-suit: Preempt
3 NT: Preempt in a Minor and decent top strength 4 is pass/correct
4 : Preempt in a Minor without decent top strength Guess!
4 : Good preempt in a Major (SAT-type) Guess! If you bid the "wrong major" you are making a slam invitation.
4 : Bad prempt in a Major Guess! (or just pass and let the opponents collect 400 or so, when defending against 4 which THEY should be playing.
4 : Preempt with Spades and a Minor Guess!



If you wish to include this feature, or any other feature, of the game of bridge in your partnership agreement, then please make certain that the concept is understood by both partners. Be aware whether or not the feature is alertable or not and whether an announcement should or must be made. Check with the governing body and/or the bridge district and/or the bridge unit prior to the game to establish the guidelines applied. Please include the particular feature on your convention card in order that your opponents are also aware of this feature during the bidding process, since this information must be made known to them according to the Laws of Duplicate Contract Bridge. We do not always include the procedure regarding Alerts and/or Announcements, since these regulations are changed and revised during time by the governing body. It is our intention only to present the information as concisely and as accurately as possible.