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Event: U1825 Group A

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Opponent Rating Result
John (jnr) Wall 152 1 - 0
Stuart MacDonald 152 0 - 1
David M Owen 152 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

19 = (456 + 400 * (1 - 2)) / 3)

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