Event: Division 3

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Opponent Rating Result
Daniel Hodson 1653 0 - 1
Michael I Williams 1717 0 - 1
S Bose 1634 1 - 0
Joe W Butterworth 1633 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1459 = (6637 + 400 * (1 - 3)) / 4)

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