Event: Individual Championship

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Opponent Rating Result
John Regan 107 0 - 1
Graham J Ashcroft 165 0 - 1
Leslie Hughes 101 1 - 0
Patrick N Coleman 106 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

20 = (479 + 400 * (1 - 2)) / 4)

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