Event: Division 1

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Opponent Rating Result
Chris Haynes 1693 1 - 0
Nigel Hosken 2031 ½ - ½
Rob J Cannell 2279 0 - 1
Robert Ashworth 1948 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1888 = (7951 + 400 * (1 - 2)) / 4)

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