ChessWorld Glossary
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All-play-all: Course Module FormatPlease read the background about the course concept, and then practice the concept using the 'Practice Resources' found at the end of this course module pageThe TheoryThe most common format of Chess tournament in correspondence chess. It is when every player of a tournament plays each other. It is also known as a "Round Robin" tournament. A "double" Round Robin tournament is when each player plays White and Black (two games) against each otherIn the diagram below the tournament, (a four player all-play-all), crosstable shows a "double round robin" format:  The tournament comprises 12 games in total and each participant will play 6 games. The formula for calculating the total number of games in a "double-round robin" is (number of participants in the tournament ^ 2) - number of participants. So, for a 10 player all play all double round robin, there would be a total of (10 ^ 2) - 10 = 100-10 = 90 games. The formula for calculating the number of games for each participant in a "double-round robin" is (number of participants - 1) x 2. In the example of the 10 player all play all each participant would play (10 - 1) x 2 = 18 games. This kind of format is ideal for correspondence chess, because there is plenty of time between moves to facilitate playing games in parallel. For over-the-board chess however, the most popular tournament format follows the "Swiss" system of pairings. This facilitates tournaments being larger even with hundreds of people, within 5-7 rounds typically. |
Practice resources |