Event: HDCA Summer League Division 2

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Opponent Rating Result
Steve J Thrower 102 0 - 1
Steve Hughes 104 0 - 1
John Thompson 101 0 - 1
Steve Donoghue 75 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-305 = (382 + 400 * (0 - 4)) / 4)

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