Event: Division 3

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Opponent Rating Result
David Ince 1500 0 - 1
Edmund Southgate 1431 0 - 1
Kevin Fröbel 1350 1 - 0
Reuben Marden 1400 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1220 = (5681 + 400 * (1 - 3)) / 4)

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