Event: Rainham Championship Div 1

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Opponent Rating Result
Chris D Brown 1441 0 - 1
Keith Nevols 1769 1 - 0
Andrew C Waters 1909 1 - 0
Robert Springett 1657 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1894 = (6776 + 400 * (3 - 1)) / 4)

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