Event: Derby Chess Club Championship

Opponent Rating Result
David Williams 0 0 - 1
Andre Cockburn 0 ½ - ½
Christian Smith 0 0 - 1
Jacob Godwin 0 1 - 0
Joseph Pearce 0 1 - 0
Matthew Caswell 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-67 = (0 + 400 * (2 - 3)) / 6)

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