Event: Club Championship

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Opponent Rating Result
John G Cooper 1923 0 - 1
Lee Williams 0 1 - 0
David E Aspinall 1719 0 - 1
Graham Smith 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

811 = (3642 + 400 * (1 - 2)) / 4)

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