Event: Folkestone Club Championship

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Opponent Rating Result
David J Shire 176 ½ - ½
Jim R Bayford 180 0 - 1
Tayfun Demirbilek 152 1 - 0
Kevin Smyth 161 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

67 = (669 + 400 * (1 - 2)) / 4)

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