Event: Division 1

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Opponent Rating Result
Callum Welsh 1945 0 - 1
Dave Patrick 1769 0 - 1
David Barlow 2010 0 - 1
Charlie Wainwright 1754 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1470 = (7478 + 400 * (0 - 4)) / 4)

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