Event: Div 4 - Athenaeum Cup

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Opponent Rating Result
Norman A Wragg 1679 ½ - ½
Seth Woozeer 1773 0 - 1
Jonathan Ferguson 1673 1 - 0
Robert Black 1608 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1783 = (6733 + 400 * (2 - 1)) / 4)

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