Event: Division 2

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Opponent Rating Result
William Earnshaw 0 ½ - ½
Donna Chadwick 1297 1 - 0
Marcus Fung 1713 0 - 1
Ermi Preza 1159 1 - 0
Marcus Fung 1713 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1176 = (5882 + 400 * (2 - 2)) / 5)

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