Event: Division 1

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Opponent Rating Result
Peter Kirby 2054 1 - 0
Daniel M Lambourne 2077 ½ - ½
Robert Ashworth 1954 ½ - ½
Matthew Hammond 1857 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2186 = (7942 + 400 * (2 - 0)) / 4)

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