Event: Division 2

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Opponent Rating Result
Bill Kimberley 1624 ½ - ½
Adam Routledge 1778 0 - 1
Philip Sykes 1574 0 - 1
Sam Duffield 1255 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1258 = (6231 + 400 * (0 - 3)) / 4)

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