Event: Division 2

Opponent Rating Result
John A Metcalfe 1191 1 - 0
Adam Millington 0 0 - 1
W Douglas McLellan 1135 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

642 = (2326 + 400 * (1 - 2)) / 3)

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