Event: E Division

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Opponent Rating Result
Bryony Eccleston 1451 0 - 1
Anthony Jinks 1576 ½ - ½
Bryony Eccleston 1451 1 - 0
Alex I Benner 1656 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1434 = (6134 + 400 * (1 - 2)) / 4)

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