Event: Div 4 - Athenaeum Cup

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Opponent Rating Result
Tom Hails 1647 0 - 1
Konstantin Rybalcenko 1589 ½ - ½
Benjamin Layton 1578 0 - 1
Sarah L White 1525 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1485 = (6339 + 400 * (1 - 2)) / 4)

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