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Hashiwokakero (橋をかけろ ''Hashi o kakero''; lit. "build bridges!") is a type of logic puzzle published by Nikoli.〔Puzzle Cyclopedia, Nikoli, 2004. ISBN 4-89072-406-0.〕 It has also been published in English under the name ''Bridges'' or ''Chopsticks'' (based on a mistranslation: the ''hashi'' of the title, 橋, means ''bridge''; ''hashi'' written with another character, 箸, means ''chopsticks''). It has also appeared in ''The Times'' under the name ''Hashi''. In France, Denmark, the Netherlands, and Belgium it is published under the name Ai-Ki-Ai. == Rules == ''Hashiwokakero'' is played on a rectangular grid with no standard size, although the grid itself is not usually drawn. Some cells start out with (usually encircled) numbers from 1 to 8 inclusive; these are the ''islands''. The rest of the cells are empty. The goal is to connect all of the islands by drawing a series of bridges between the islands. The bridges must follow certain criteria:〔.〕 * They must begin and end at distinct islands, travelling a straight line in between. * They must not cross any other bridges or islands. * They may only run orthogonally (parallel to the grid edges). * At most two bridges connect a pair of islands. * The number of bridges connected to each island must match the number on that island. * The bridges must connect the islands into a single connected group. 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「Hashiwokakero」の詳細全文を読む スポンサード リンク
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