Event: Div 4 - Athenaeum Cup

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Opponent Rating Result
Mark Kirkham 1547 0 - 1
Sarah L White 1550 0 - 1
Benjamin Layton 1226 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1174 = (4323 + 400 * (0 - 2)) / 3)

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