Event: Roger Goldsmith Div 2

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Opponent Rating Result
Ray Firman 1146 1 - 0
Mike Angel 1407 0 - 1
Peter Jones 1200 0 - 1
Nathan Cartledge 1645 ½ - ½
Hugo Smith 1518 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1223 = (6916 + 400 * (1 - 3)) / 5)

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