Event: Division 1

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Opponent Rating Result
Leslie J Crane 1801 0 - 1
Simon A White 1754 1 - 0
James M Robinson 1875 ½ - ½
Christopher Willoughby 1888 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1730 = (7318 + 400 * (1 - 2)) / 4)

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