Event: Essex OL U1500 Championship

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Opponent Rating Result
Peter Kukiewicz 1143 0 - 1
Dinil Siriwardana 1006 0 - 1
John V Jestico 1364 0 - 1
Rostislav Kovalev 900 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

803 = (4413 + 400 * (0 - 3)) / 4)

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