Event: Division 4

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Opponent Rating Result
John A Amison 1600 0 - 1
Miheli Gunarathne 1552 0 - 1
Richard Dyce 1502 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1418 = (4654 + 400 * (1 - 2)) / 3)

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