Event: Division One

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Opponent Rating Result
William J Foo 2150 1 - 0
Peter M Gayson 2126 ½ - ½
Jonathan W Arnott 2259 0 - 1
Elis D Dicen 2187 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2081 = (8722 + 400 * (1 - 2)) / 4)

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