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Event: The National 100

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Opponent Rating Result
David J jnr Foster 145 1 - 0
Leon Groot Wassink 131 ½ - ½
William Chen 145 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

140 = (421 + 400 * (1 - 1)) / 3)

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