Event: Roger Goldsmith Div 1

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Opponent Rating Result
Isaac Kim 0 1 - 0
Peter Newton 1654 0 - 1
Steven M Ashworth 1493 1 - 0
Charles J Richmond 1570 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1179 = (4717 + 400 * (2 - 2)) / 4)

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