Event: Division 4

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Opponent Rating Result
Jonas Zurba 1779 1 - 0
Edward Ames 1377 1 - 0
Alastair Prince 1649 0 - 1
Charlie Papworth 1678 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1821 = (6483 + 400 * (3 - 1)) / 4)

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