Event: Derby Chess Club Championship

Opponent Rating Result
Chris Sharp 0 1 - 0
David Smith 0 0 - 1
Stuart Marshall 0 ½ - ½
Matthew Caswell 0 ½ - ½
Justin Smith 0 1 - 0
David Williams 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

133 = (0 + 400 * (3 - 1)) / 6)

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