Event: Division 4

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Opponent Rating Result
Rob Jarvis 1603 0 - 1
Alex Clements 1246 0 - 1
Patrick Cridland 1400 1 - 0
Daniel Walker 1444 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1223 = (5693 + 400 * (1 - 3)) / 4)

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