Event: Division 3

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Opponent Rating Result
Roger Bray 1568 1 - 0
Ken Jones 1608 1 - 0
Samuel Baugh 1600 0 - 1
David J Barker 1481 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1764 = (6257 + 400 * (3 - 1)) / 4)

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