Event: Division Three

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Opponent Rating Result
David Smith 1872 0 - 1
Mark A Drugan 1739 0 - 1
David Thomson 1833 0 - 1
John P Wrench 1976 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1455 = (7420 + 400 * (0 - 4)) / 4)

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