Event: Division 1

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Opponent Rating Result
Mark Broom 2150 ½ - ½
Geoffrey H James 2051 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1901 = (4201 + 400 * (0 - 1)) / 2)

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Opponent Rating Result
Ian S Comley 1887 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2287 = (1887 + 400 * (1 - 0)) / 1)