Event: Whittlesford (Challengers)

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Opponent Rating Result
Rob Davies 1278 1 - 0
Roman Bartels 0 0 - 1
Andrew P Willoughby 1733 0 - 1
Chris Flynn 1525 0 - 1
Rene Butler 1164 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1060 = (5700 + 400 * (2 - 3)) / 5)

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