Event: Summer Knights

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Opponent Rating Result
Will Stafford 1414 0 - 1
Djuna L Tree 1633 ½ - ½
Karina Kowalczyk 1563 0 - 1
Venerando Bermudez 1440 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1413 = (6050 + 400 * (1 - 2)) / 4)

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