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🏛️Official — ACBL
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Played with a pack of 52 cards, consisting of thirteen cards in each of four suits (Law 1A); The suits rank downward in the order spades (♠), hearts (♥), diamonds (♦), clubs (♣) (Law 1A); The cards of each suit rank downward: Ace, King, Queen, Jack, 10, 9, 8, 7, 6, 5, 4,...
— Law 1, Law 2
Four players per table form two sides, North-South and East-West (Law 4); In pair or team events contestants enter as pairs or teams and keep the same partnership throughout a session; in individual events partnerships change during the session (Law 4); The Director assigns an initial position to...
— Law 4, Law 5, Law 6
Why people argue about this
People often argue about how partnerships are formed in Duplicate Bridge because they misunderstand that while pairs enter as teams for a session, their initial positions (North-South or East-West) are assigned by the Director based on the order of play rather than their partnership status, leading to confusion about who plays with whom.
The auction period begins for a side when either partner withdraws his cards from the board (Law 17A); The player designated by the board as dealer makes the first call; thereafter each player calls in turn clockwise (Law 17B, 17C); A bid designates a number of odd tricks — tricks in excess of si...
— Law 17, Law 18, Law 19, Law 22, Law 41, Law 44
Why people argue about this
People often assume that once a player makes their initial call in the auction phase of Duplicate Bridge, they can't change it later, but actually, players are allowed to revise their bid as many times as needed until they commit to one final bid before play begins, which is why there's confusion about when and how changes can be made.
Each deal is scored from the Duplicate Bridge Scoring Table (Law 77), which sets trick scores, premiums and penalties; Declarer's side scores if it makes the contract; the defenders score if it fails; Vulnerability, shown on the board, raises both the bonuses and the penalties
— Law 77, Law 78
Why people argue about this
People often think that if a deal is vulnerable, only the bonuses are doubled for both sides, forgetting about the penalties which also double, leading to potential score discrepancies. The confusion arises because the rules explicitly state Vulnerability affects both bonuses and penalties equally on either side of the table, but many overlook this detail in their calculations.
Pairs events, normally matchpointed, are the most common club format; Teams events compare two tables playing the same boards in opposite directions, normally scored in IMPs; Individual events change partnerships during the session (Law 4)
— Law 4, Law 81
Why people argue about this
People often assume that in Individual events of Duplicate Bridge (ACBL), all players compete against each other head-to-head throughout the session, which isn't accurate. Actually, they change partnerships during the session as per Law 4, playing different boards with various partners rather than facing off directly against one another.
Played with a pack of 52 cards, consisting of thirteen cards in each of four suits (Law 1A); The suits rank downward in the order spades (♠), hearts (♥), diamonds (♦), clubs (♣) (Law 1A); The cards of each suit rank downward: Ace, King, Queen, Jack, 10, 9, 8, 7, 6, 5, 4,...
— Law 1
Each deal is held in a board with four pockets, one per hand (Law 2); The board designates the dealer and which side is vulnerable, so every table plays the deal under identical conditions; Boards are numbered, letting the same deal be compared across the whole field
— Law 2
Why people argue about this
People often assume that the numbering of boards is just for keeping track of which deal has been played where, but they overlook how crucial it is in ensuring fairness across all tables - without board numbers, deals could be swapped between tables, completely undermining the concept of identical conditions and vulnerability designations.
The auction ends when, one or more players having bid, there are three consecutive passes — the last bid becomes the contract (Law 22A); If all four players pass, the hands are returned to the board without play, and there is no redeal (Law 22B)
— Law 22
Pairs events, normally matchpointed, are the most common club format; Teams events compare two tables playing the same boards in opposite directions, normally scored in IMPs; Individual events change partnerships during the session (Law 4)
— Law 4
Each contestant is compared with everyone who played the same board; Two scoring units for each score inferior to yours, one for each equal score, and zero for each superior score; This is the standard method for pairs events — beating the field on a board matters more than the size of the margin
International Matchpoint (IMP) scoring: the total point difference on each board is converted to IMPs on a fixed scale (Law 78B) — standard for team events; Total point scoring: the raw point totals are aggregated (Law 78C); The Conditions of Contest announce which method applies before play (Law...
— Law 78
Four players per table form two sides, North-South and East-West (Law 4); In pair or team events contestants enter as pairs or teams and keep the same partnership throughout a session; in individual events partnerships change during the session (Law 4); The Director assigns an initial position to...
— Law 4, Law 5
The social ancestor of the duplicate game: hands are dealt and played once, with no board and no comparison; Scoring runs across a rubber rather than per deal, so the Laws of Duplicate Bridge do not apply in full
Why people argue about this
People often assume that since Rubber Bridge is a precursor to Duplicate Bridge, it should follow all of its rules, leading to misunderstandings about how scoring works in Rubber Bridge, which operates differently by running across an entire rubber (series) rather than per deal as in full Duplicate.
The auction period begins for a side when either partner withdraws his cards from the board (Law 17A); The player designated by the board as dealer makes the first call; thereafter each player calls in turn clockwise (Law 17B, 17C); A bid designates a number of odd tricks — tricks in excess of si...
— Law 17, Law 18, Law 19
The Regulating Authority may require the face of each card to be symmetrical (Law 1B); The backs of all 52 cards in a deck should be identical, so no card is identifiable from the back (Law 1C)
— Law 1
Cards are dealt face down, one at a time, into four hands of thirteen cards, each placed face down in one of the board's pockets (Law 6B); No two adjacent cards from the deck shall be dealt into the same hand (Law 6B); The recommended procedure is to deal in rotation, clockwise (Law 6B)
— Law 6
Each deal is scored from the Duplicate Bridge Scoring Table (Law 77), which sets trick scores, premiums and penalties; Declarer's side scores if it makes the contract; the defenders score if it fails; Vulnerability, shown on the board, raises both the bonuses and the penalties
— Law 77
The Director is the official representative of the Tournament Organizer and is responsible for on-site technical management (Law 81A, 81B); The Director — not the players — has the responsibility for rectifying irregularities (Law 81C); Call the Director as soon as an irregularity is noticed; pla...
— Law 81
After three passes, the defender on presumed declarer's left makes the opening lead face down (Law 41A); Before it is faced, the leader's partner and the presumed declarer may ask for a review of the auction (Law 41B); dummy's hand is then spread; The player who leads to a trick may play any card...
— Law 41, Law 44
Why people argue about this
People often assume that if they face down their lead card before it's asked about in Law 41B, they can play any card from their hand without restriction, which is incorrect. The confusion arises because the rule specifically states that after facing down a trick, the player who led must then follow suit with one of their own cards or the dummy's, not just any card from their hand.
Before play starts, each pack is thoroughly shuffled (Law 6A); There is a cut if either opponent so requests (Law 6A)
— Law 6