Event: Division 4

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Opponent Rating Result
Russell Cowell 1626 ½ - ½
Jane Reece 1584 ½ - ½
Joe Ormrod 2037 0 - 1
J Newton 1430 1 - 0
Bob Steele 1487 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1713 = (8164 + 400 * (2 - 1)) / 5)

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