Event: Division 2

Opponent Rating Result
William Fairclough 1495 0 - 1
Ermi Preza 1159 ½ - ½
James Parker 873 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1176 = (3527 + 400 * (1 - 1)) / 3)

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