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A duplicate bridge movement is a scheme used in a duplicate bridge tournament to arrange which competitors play which opponents when, and which boards they play. The arrangement has to satisfy a number of constraints which often conflict to some extent, and compromises may be required. The resolution of these compromises is to a considerable extent a matter of taste, and if possible the players should be consulted as to their preferences. Movements are categorized by the type of event—Individual, Pairs, or Teams. ==Requirements for movements== The requirements for the movement are as follows: *The only really inflexible requirement is that no individual/pair/team plays the same boards more than once. *The tournament should not be either too long or too short. A typical club session consists of around 24 boards, but a tournament for less experienced players may aim for rather fewer than this. *No board should be required to be played at more than one table in the same round. Sometimes this rule is broken: the boards can be passed from one table to another during the course of a round. *The movement should be as fair (or "balanced") as possible: in principle, this means that each pair should have an approximately equal opportunity to oppose each other pair, taking into account both "direct opponents" (who face one another at the same table) and "indirect opponents" (who play the same hands as each other at different times). *For preference, the number of boards in each round should be as large as possible, since this reduces the number of rounds and saves some time. *Subject to the other constraints, the movement should be as simple as possible, in order to minimise the possibility of errors occurring. *In some countries it is usual for the boards to progress regularly, or as close as possible to regularly, from one table to the next lower numbered table. In other countries the boards are simply collected from a central table and this constraint does not apply. It is important that once the movement is selected, it should be completed: uncompleted movements are likely to be unbalanced. Thus a movement should be selected which has a high probability of being completed. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Duplicate bridge movements」の詳細全文を読む スポンサード リンク
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