Event: Division 4

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Opponent Rating Result
Michael O Bristow 1200 ½ - ½
Mike J Johnson 1568 0 - 1
Edward Wolstenholme 1200 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1056 = (3968 + 400 * (0 - 2)) / 3)

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