Event: Division 3

Opponent Rating Result
Chris W Pitt 1614 0 - 1
David Collyer 1692 0 - 1
Mike Warden 1549 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1485 = (4855 + 400 * (1 - 2)) / 3)

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