Event: Division 3

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Opponent Rating Result
Tom A Cleverley 1591 0 - 1
George Courtney-Holt 1303 1 - 0
Rhys Perry 1515 0 - 1
Glenn S Bourne 1432 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1260 = (5841 + 400 * (1 - 3)) / 4)

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