Event: Club Championship

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Opponent Rating Result
Steven M Flaherty 1609 0 - 1
Donna Chadwick 1209 1 - 0
George Turner 1991 0 - 1
Matthew Poon 1630 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1510 = (6439 + 400 * (1 - 2)) / 4)

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