Event: Derby Chess Club Championship

Opponent Rating Result
Mohinderpal Samra 0 1 - 0
Justin Smith 0 0 - 1
David Smith 0 1 - 0
Owen Crawford 0 1 - 0
Stuart Marshall 0 1 - 0
Ray J Forey 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

133 = (0 + 400 * (4 - 2)) / 6)

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