Event: Essex Summer Rapid Knockout

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Opponent Rating Result
Gavin James Hughes 1949 ½ - ½
Gavin James Hughes 1949 1 - 0
Colin R Ramage 1944 0 - 1
Colin R Ramage 1944 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1847 = (7786 + 400 * (1 - 2)) / 4)

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