Event: C Division

Opponent Rating Result
Richard A Gavin 1739 1 - 0
Rod Middleton 1668 1 - 0
Paul Keech 1774 0 - 1
Julian A Alderton 1736 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1729 = (6917 + 400 * (2 - 2)) / 4)

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