Event: Division 3

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Opponent Rating Result
John S Marsh 1681 0 - 1
Alex Johnson 1455 ½ - ½
Kai Harkensee 1300 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1212 = (4436 + 400 * (0 - 2)) / 3)

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