Event: Individual Championship

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Opponent Rating Result
Graham J Ashcroft 165 1 - 0
John Regan 107 1 - 0
Malcolm R Peacock 189 1 - 0
David A Phillips 179 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

560 = (640 + 400 * (4 - 0)) / 4)

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