Event: E Division

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Opponent Rating Result
Nathan Harvey-Jones 1686 0 - 1
Simon Wright 1766 0 - 1
Mark Davis 1599 1 - 0
Bryony Eccleston 1451 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1526 = (6502 + 400 * (1 - 2)) / 4)

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