Event: Division 2

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Opponent Rating Result
Matthew Grimley 1520 0 - 1
Natalie Haydock 1354 0 - 1
Daniel Miller 1492 0 - 1
Natalie Haydock 1390 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1039 = (5756 + 400 * (0 - 4)) / 4)

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