might last no more than a few days, weeks, or months; a game played by post between players in different countries might last several years.

Structure

Correspondence chess differs from over-the-board (OTB) play in several respects. While players in OTB chess generally play one game at a time (an exception being a simultaneous exhibition), correspondence players often have several games going at once. Tournament games are played concurrently, and some players may have more than

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