Event: Division 3

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Opponent Rating Result
Jim B Kellock 1045 1 - 0
Roy J Gurney 1405 1 - 0
Nick M Wyld 1450 0 - 1
Nigel Smith 1100 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1350 = (5000 + 400 * (2 - 1)) / 4)

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