Event: Division 4 - Athenaeum Cup

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Opponent Rating Result
John Speck 102 0 - 1
David Margerison 120 1 - 0
Mark Kirkham 107 ½ - ½
Chris Allen 130 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

15 = (459 + 400 * (1 - 2)) / 4)

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