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Event: The National 100

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Opponent Rating Result
John Stubbs 145 1 - 0
Chris Antonopoulos 90 1 - 0
Leon Groot Wassink 90 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

375 = (325 + 400 * (2 - 0)) / 3)

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