Event: Macclesfield Individual Championship

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Opponent Rating Result
James Heppell 170 0 - 1
Dave A Risley 175 ½ - ½
Joachim Trier 140 1 - 0
Geoff Laurence 154 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

260 = (639 + 400 * (2 - 1)) / 4)

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