Event: C Division

Opponent Rating Result
George Turner 1808 0 - 1
Paul Keech 1760 ½ - ½
Christopher Hodgson 1736 0 - 1
Mohammed Rohman 1486 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1598 = (6790 + 400 * (1 - 2)) / 4)

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