Event: Division 3

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Opponent Rating Result
Mark SR Radford 1772 0 - 1
Barry T Redburn 1662 0 - 1
Robert H Willoughby 1642 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1559 = (5076 + 400 * (1 - 2)) / 3)

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