Event: Division 4

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Opponent Rating Result
John W Southcote 1556 1 - 0
Alex Worsell 0 0 - 1
Paul Patouilliart 0 1 - 0
Phil Taylor 1471 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

757 = (3027 + 400 * (2 - 2)) / 4)

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