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  2. Laws of Duplicate Bridge - Wikipedia

    en.wikipedia.org/wiki/Laws_of_Duplicate_Bridge

    The first Laws of Duplicate Contract Bridge were published in 1928. [1] They were revised in 1933, 1935, 1943, 1949, 1963, 1975, 1987, 1997, 2007 and 2017. [2] The Laws are effective worldwide for all duplicate bridge tournaments sponsored by WBF, zonal, national and subordinate organizations (which includes most bridge clubs).

  3. Law of total tricks - Wikipedia

    en.wikipedia.org/wiki/Law_of_total_tricks

    If the N-S diamonds were divided 4-2 instead of 5-1, with clubs consequently divided 3-3, the available total tricks would be only 8 for N-S + 8 for E-W = 16 If, on the other hand, the E-W spades were divided 3-1 instead of 2-2 (with appropriate minor-suit rearrangement), they could make 2 ♥ , while N-S could still make 4 ♠ , giving 18 ...

  4. 25 Bridge Conventions You Should Know - Wikipedia

    en.wikipedia.org/wiki/25_Bridge_Conventions_You...

    The book is aimed at beginners, with each chapter outlining a single convention, including takeout doubles, negative doubles, and cuebid raises. [1] All chapters are followed by a quiz. Since its publication, the book has sold over 300,000 copies, [2] and won the American Bridge Teachers' Association Book of the Year (Student) award. [3]

  5. Contract bridge probabilities - Wikipedia

    en.wikipedia.org/wiki/Contract_bridge_probabilities

    Suppose East is known to have 7 spades from the bidding and after seeing dummy you deduce West to hold 2 spades; then if your two lines of play are to hope either for diamonds 5-3 or clubs 4-2, the a priori probabilities are 47% and 48% respectively but (,,,) % and (,,,) % so now the club line is significantly better than the diamond line.

  6. Fourth suit forcing - Wikipedia

    en.wikipedia.org/wiki/Fourth_suit_forcing

    Here, the 2 ♠ bid denotes a four card spade support and a hand too strong for a fast-arrival bid of 4 ♠. This assumes the partnership are playing all FSF bids, at 2 or 3 level, as forcing to game. If playing that a 2 level FSF bid is forcing for one round only, responder will need to jump to 3 ♠ on the third round to create the game force.

  7. Bergen raises - Wikipedia

    en.wikipedia.org/wiki/Bergen_raises

    In contract bridge, Bergen raises are conventional treatments of responses to a major suit opening in a five-card major system. [1] Developed by Marty Bergen and first published in April 1982, [2] Bergen raises are based on the Law of total tricks, a hand evaluation concept which states that with a combined nine trumps in the partnership one should compete to at least the three-level ...

  8. Duplicate bridge movements - Wikipedia

    en.wikipedia.org/wiki/Duplicate_bridge_movements

    If r is the number of rounds and s is the number of rounds in which all tables arrow switch, the pairs who play as opponents in the rounds that are not arrow switched have a relative influence of (r-1) for the board group played head to head, -(r-1-2s) for board groups played in opposite direction at different tables, and 2s for rounds played ...

  9. The Official Encyclopedia of Bridge - Wikipedia

    en.wikipedia.org/wiki/The_Official_Encyclopedia...

    Main listings: The Introduction [3] indicates that the entries in the main listings fall into five main categories (technical, historical, procedural, biographical and geographical, and terminological) and are presented alphabetically over 683 pages with entries frequently ending with cross-references to other entries on related category topics ...

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