Event: Essex Summer Rapid Knockout

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Opponent Rating Result
Joe Crossley 1575 1 - 0
Joe Crossley 1575 ½ - ½
Robbie Staff 1877 1 - 0
Robbie Staff 1877 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1926 = (6904 + 400 * (2 - 0)) / 4)

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