Event: Division 3

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Opponent Rating Result
John Tennyson 2003 1 - 0
Jonathan P Marrow 1858 0 - 1
Tom A Barton 1876 0 - 1
Djuna L Tree 1690 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1657 = (7427 + 400 * (1 - 3)) / 4)

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