Event: Roger Goldsmith Div 2

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Opponent Rating Result
Stuart Ross 1723 ½ - ½
Nathan Weersing 1563 0 - 1
Simon Marsden 1570 1 - 0
Eugene Husband 1585 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1610 = (6441 + 400 * (1 - 1)) / 4)

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