Event: Rochester Championship

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Opponent Rating Result
Andrew L Gillard 1563 ½ - ½
Keith Nevols 1938 ½ - ½
Tyrone R Jefferies 1555 0 - 1
Rob Woolacott 1688 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1686 = (6744 + 400 * (1 - 1)) / 4)

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