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ACBL Tech File
BAM  Conditions Of Contest


This document is provided courtesy of the
American Contract Bridge League

2990 Airways Blvd. S Memphis TN 381163847
S Fax 9013987754

     NOTE: to view the latest revision of the handbook,
download the latest version of ACBLScore

      Rev.(12/03)                                        CCBAM.033 (PAGE 1) 



     These Conditions of Contest may not be changed at any level of play

     during the course of this event.


     Lack of knowledge does not constitute cause for exemption.


     These conditions apply to all board-a-match (BAM) team events. At the

     North American Bridge Championships, there may be additional specific

     conditions for certain events. In such cases the specific conditions

     will supersede the general ones. These conditions must be posted.

     Sponsoring organizations may amend these conditions for specific

     events but such amendments must appear in all printed tournament

     schedules. Furthermore they must be posted prior to the start of



     Sponsoring organizations may, with ACBL approval only, amend these

     conditions for a specific event.


     The final decision on any item in these conditions shall be made by

     the Director-in-Charge. Furthermore, any issue not specifically

     covered will be resolved by the Director-in-Charge.



     1. Each team may consist of four, five or six players. Entry may be

        restricted by gender (all men, all women or in the case of mixed

        teams no more than three people may be of one gender). In events

        which have a masterpoint restriction the team's entry will be

        based on the player with the highest masterpoint holding. However,

        Life Master events require that all team members be ACBL Life

        Masters or its equivalent.  


     2. Each player must play at least fifty percent of the boards, played

        by the team to be eligible for either session or overall

        masterpoint awards. Other than to cover an emergency, changes in a

        team's lineup may not be made once play has begun.


     3. An ineligible player is disqualified. The ineligible player's team

        will be disqualified unless the Director-in-Charge determines that

        teammates were unknowledgeable about the deficiency of the

        disqualified member. Any team reduced to fewer than three original

        members due to disqualification of ineligible players is



      When a player(s) and team is disqualified after the correction period

      for the event has ended because the deficiency was discovered then,

      the disqualified team's position remains vacant. In ongoing events,

      teams move up one position as appropriate.



                                                        CCBAM.033 (PAGE 2) 



     1. Sponsoring organizations must announce in advance the type of

        event scheduled. Options include open, Life Master, events

        restricted by either an upper or lower masterpoint limitation,

        flighted, stratified or strati-flighted. In addition each event

        may be segregated by requiring both pairs to each be men, women or

        that they be mixed (i.e one man and one woman).


         In flighted events groups are segregated by masterpoint totals

         (i.e A is Open, B is restricted to players with less than 1000

         MP's and C for players with less than 300 MP's).


         In stratified events the three groups play together but are ranked

         both collectively and separately (i.e a C player can win points by

         ranking in A, B or C).


         In strati-flighted events at least one group is segregated and

         another stratified (i.e A is Open, B is stratified with the top

         group 300 - 1000 and the second group 0 - 300).


     2. Events may be run from one to six sessions and may have cuts in

        the size of the field after specified sessions. Consolation events

        may be run concurrently with the final session(s) at the

        discretion of the Sponsoring Organization.


     3. Any player(s) that withdraws from a team may not participate in

        any concurrent championship event (two or more sessions) while the

        team is still competing in the BAM event.


         They and players sitting out a session may play in a concurrent

         single session event. However if the event is a Side Game Series

         (Continuous Pairs) that session will not count toward overall

         placings in that event for either member of the partnership. In

         addition the pair will not be eligible for to win gold points for

         section tops at Regionals or NABC's.


     4. A partnership is responsible for knowing when their methods apply

        in probable (to be expected) auctions. A pair may be entitled to

        redress if their opponents did not originally have a clear

        understanding of when and how to use a convention that was




     A strong effort must be made to achieve a valid table result at each

     table.  When both tables achieve a valid result and they have played

     the identical deal, then the results are compared in the normal

     manner, with a BAM score for each team of zero, half, or one.


     A score assigned by a director or a committee is considered a valid

     result if it is assigned in total points prior to matchpointing (140,

     400, etc.) The scores awarded to each side need not balance.  The

     assigned score or scores are then compared against the result at the

     other table in the normal manner to reach a BAM score of zero, half,

     or one.



                                                        CCBAM.033 (PAGE 3) 


     When the scores assigned to the opposing sides are different, the BAM

     matchpoints for that deal need not total one.  NOTE: Directors and

     committees shall assign adjusted scores only to the table at which an

     irregularity occurred, NOT to the whole team.  An adjusted score at

     one table shall not invalidate a legitimate result at the other table.


     If a board is unplayable for any reason, then:

     1. If the board has not yet been played at the other table, the

        director shall substitute a new board if practical.


     2. If the board has already been played at the other table, or if

        substituting a new board is not practical, the director shall

        assign percentage scores to the pairs at the affected table,  as


        a. If neither side is responsible for the irregularity, each pair

           receives a matchpoint score of 50%.

        b. If only one side is responsible, that pair receives 40% and

           their opponents receive 60%.

        c. If both sides are responsible, they both receive 40%.


        These percentage assignments are NOT Average-Plus and Average-Minus.

        A 60-40 assignment is exactly that.


     3. The result obtained at the other table is matchpointed across the

        field of pairs in the same comparison group who played the same

        board.  The matchpoint percentage scores achieved by the pairs at

        that table are added to the assigned percentage scores at the

        table with the irregularity, and:

        a. A team that totals 120% or more receives a win.

        b. A team that totals 80% or less receives a loss.

        c. A team that totals more than 80% and less than 120% receives a



     4. If a board is unplayable at BOTH tables, then:

        a. If both teams are responsible, they both receive zero.

        b. If neither team is responsible, they both receive half.

        c. If one team is responsible, it receives zero, and their

           opponents receive their TEAM percentage of game. This is the

           ONLY case in which percentage of game (of any kind) is used.


     5. Any team or teams responsible for an irregularity requiring the

        assignment of an artificial adjusted score (percentage) shall be

        penalized 1/4 board.



     Handling of a fouled board is similar to the handling of an adjusted

     score. When both tables achieve a valid result and they have NOT

     played the identical deal, then:

     1. The director shall determine a matchpoint percentage score for the

        result at each table:

        a. If the board has been played at least six times in an identical

           condition, then the board is matchpointed across the field of

           pairs who played the board in that condition to produce a       

           matchpoint percentage.



                                                        CCBAM.033 (PAGE 4) 



        b. If the board has been played fewer than six times in an

           identical condition, the director shall assign percentages, from

           best to worst, as follows:

           (1) Five times:    60, 55, 50, 45, 40

           (2) Four times:    60, 55, 45, 40

           (3) Three, two, or one time:  50% to each pair


           Any pairs tied at a particular score receive the average of the

           appropriate percentages.


     2. The percentages of the two pairs on each team are added together,


        a. A team that totals 120% or more receives a win.

        b. A team that totals 80% or less receives a loss.

        c. A team that totals more than 80% and less than 120% receives a




     The ACBL General Convention Chart will govern bidding and playing

     methods unless the Sponsoring Organization has announced in writing to

     the contrary.



     Every effort should be made to seed all sections of the field. In

     general, each team should play against the same strength field each

     session. (Note: This is usually accomplished by making random

     adjustments in the starting position of one of the seeded fields each

     session.) While the Sponsoring Organization may provide assistance the

     final decision in all matters relating to seeding the event will rest

     with the Director-in-Charge.



     1. Events of two or more sessions may be run as some number of

        qualifying sessions and some number of final sessions. Consolation

        events may be scheduled for non-qualifiers at the discretion of

        the Sponsoring Organization. Conditions regarding the number of

        teams to be qualified should be announced as early as possible

        during the qualifying session(s).


     2. In order for a partnership to qualify for the finals at least four

        eligible team members must be present. If not, an alternate

        qualifier will be selected. From among available teams the one

        with the highest score in the qualifying session(s) will be



     3. A carryover will be calculated based on scores in the qualifying

        session(s). The scores of the teams qualifying to the finals will

        be reduced by using the percentage of teams qualified over teams

        entered. The maximum carryover cannot exceed seven boards. For six

        session events with two cuts, the maximum spread for the middle

        two rounds will be only four boards.



                                                        CCBAM.033 (PAGE 5) 



     4. The following tie breaking criteria will be used in order until

        the tie is broken:

        a. Convert all fractions of boards to one (i.e boards not lost)

        b. If all teams involved played each other the result of all boards

           played among them.

        c. Total points of all boards played in common.

        d. Total points of all boards played.



     1. Substitutes are subject to the discretion of the

        Director-in-Charge or his designee and may not appreciably

        strengthen the team. A substitute is not allowed if a fifth or

        sixth member of the team is present.


     2. A qualified team which fails to seat all team members of the

        partnership ten minutes after the announced starting time of a

        finals will be replaced by the highest available alternate




     1. The score correction period for player errors expires at the

        completion of play of the session following the one in which the

        error occurred.


     2. For director errors the correction period expires twenty four

        hours after the completion of the event or thirty minutes after

        completion of the last event of the tournament, whichever is



     3. For qualifying events  the score correction period for both player

        and director errors expires one hour before the announced starting

        time of the first final session.


     4. The appeal period of or for a Director's ruling expires one half

        hour after the completion of a session or the starting time of the

        next session whichever is earlier.

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