Event: Rapidplay League

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Opponent Rating Result
Paul May 138 ½ - ½
Paul May 138 ½ - ½
Peter Saunders 107 1 - 0
Peter Saunders 107 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

323 = (490 + 400 * (2 - 0)) / 4)

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