Event: Division 4

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Opponent Rating Result
Andrew Hutchins 0 1 - 0
Paul T Costello 0 1 - 0
Harry W Robinson 0 1 - 0
Stanley Johnson 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

400 = (0 + 400 * (4 - 0)) / 4)

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