Event: Division 4

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Opponent Rating Result
Gareth Day 0 1 - 0
William B Drennan 1784 0 - 1
Colin R Ramage 1900 0 - 1
Faye Ainscow 1625 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1227 = (5309 + 400 * (1 - 2)) / 4)

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