Event: Division 1

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Opponent Rating Result
Robert S Eames 2241 ½ - ½
Lars Astrom 2173 0 - 1
Sam AC Herring 2046 ½ - ½
Harry Grieve 2501 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2040 = (8961 + 400 * (0 - 2)) / 4)

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