Event: Division 2

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Opponent Rating Result
Herbert Lockwood 133 1 - 0
Ewen Miller 127 1 - 0
Chris Tatham 123 1 - 0
Robert A Maltby 139 1 - 0
Paul W Jones 0 1 - 0
Ewen Miller 127 0 - 1
G Malcolm Kirby 130 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

397 = (779 + 400 * (6 - 1)) / 7)

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