Event: Division 4

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Opponent Rating Result
Faye Ainscow 1625 1 - 0
Geoffrey L Bishop 1712 1 - 0
Ljubomir Koncar 1200 1 - 0
Thomas Palmer 1500 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1709 = (6037 + 400 * (3 - 1)) / 4)

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