Event: Division 2

Opponent Rating Result
Brian J Forrest 1463 1 - 0
Andrew Beavan 1435 1 - 0
Ray Rushworth 1548 0 - 1
Andrew Beavan 1435 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1670 = (5881 + 400 * (3 - 1)) / 4)

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