Event: Division Three

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Opponent Rating Result
Mike J Hollier 1845 0 - 1
David Smith 1864 ½ - ½
Robert J Purcell 1731 0 - 1
Mark A Drugan 1739 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1695 = (7179 + 400 * (1 - 2)) / 4)

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