Event: Roger Goldsmith Div 2

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Opponent Rating Result
Simon Yates 1563 0 - 1
Steve Lovell 1827 1 - 0
Stephen W Ruthen 1830 0 - 1
Simon Yates 1574 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1699 = (6794 + 400 * (2 - 2)) / 4)

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