Event: Division 2

Opponent Rating Result
John A Feavyour 1842 0 - 1
David Welsh 1506 ½ - ½
Robert L Jones 1679 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1409 = (5027 + 400 * (0 - 2)) / 3)

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