Event: Division A

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Opponent Rating Result
Colin M Walker 1825 1 - 0
Jim Sumner 0 0 - 1
Graham J Ashcroft 1953 ½ - ½
Colin M Walker 1825 ½ - ½
Jim Sumner 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1201 = (5603 + 400 * (2 - 1)) / 5)

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