Event: Division Three

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Opponent Rating Result
John Smith 1749 0 - 1
Mike P Maher 1672 0 - 1
Paul Silverman 1587 ½ - ½
Derek Green 1603 1 - 0
Akbar Khan 1375 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1597 = (7986 + 400 * (2 - 2)) / 5)

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