Event: Division 3

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Opponent Rating Result
Ronald C Andriessen 1495 0 - 1
Jonathan Cartwright 1827 1 - 0
Simon Curtis 1481 1 - 0
John CH Jones 1128 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1683 = (5931 + 400 * (3 - 1)) / 4)

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