Event: Division 4

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Opponent Rating Result
Penny A Wood 1474 0 - 1
Hector Smith 1817 0 - 1
Simon L Payne 1188 ½ - ½
Kristian Rozewiczk 0 1 - 0
Andrew Powell 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

816 = (4479 + 400 * (1 - 2)) / 5)

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