Event: Derby Chess Club Championship

Opponent Rating Result
Joseph Pearce 0 1 - 0
Ray J Forey 0 1 - 0
David Williams 0 0 - 1
Justin Smith 0 1 - 0
Owen Crawford 0 0 - 1
Christian Smith 0 1 - 0(def)
performance = (sum(opponents ratings) + 400(wins-losses)) / games

80 = (0 + 400 * (3 - 2)) / 5)

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