Event: Summer Knights

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Opponent Rating Result
Arnold Hunt 1563 0 - 1
Venerando Bermudez 1450 1 - 0
Djuna L Tree 1633 0 - 1
Stephen T Welch 1454 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1425 = (6100 + 400 * (1 - 2)) / 4)

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