Event: Division 5

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Opponent Rating Result
Peter J Windows 124 1 - 0
Simon Layhe 116 ½ - ½
Ewan Haas 96 1 - 0
Adam Fields 89 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

406 = (425 + 400 * (3 - 0)) / 4)

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