Event: Division 6

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Opponent Rating Result
Toby Kattenbelt 1661 0 - 1
Graham Strickland 1464 0 - 1
Simon M Hall 1490 1 - 0
James Wotherspoon 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

954 = (4615 + 400 * (1 - 3)) / 4)

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