Event: The Friendly League

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Opponent Rating Result
Andrew Thornley 1423 0 - 1
Peter Dickinson 1548 0 - 1
Peter Hurn 1559 0 - 1
B Searson 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

733 = (4530 + 400 * (0 - 4)) / 4)

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