Event: Essex Summer Rapid Plate

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Opponent Rating Result
Ken W Clow 1723 1 - 0
Ken W Clow 1723 ½ - ½
Rahul Ghose 1833 0 - 1
Rahul Ghose 1833 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1678 = (7112 + 400 * (1 - 2)) / 4)

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