Event: Summer League Division 3

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Opponent Rating Result
Peter Cooper 1629 0 - 1
Ron Keenan 1543 0 - 1
Dave Cook 1482 ½ - ½
Andrew Nettleship 1551 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1251 = (6205 + 400 * (0 - 3)) / 4)

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