Event: D Division

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Opponent Rating Result
Bryony Eccleston 1609 0 - 1
Peter Horwell 1614 1 - 0
Con Carey 1471 ½ - ½
Edward Chu 1509 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1451 = (6203 + 400 * (1 - 2)) / 4)

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