Event: Rochester Championship

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Opponent Rating Result
Keith G Hyde 1840 ½ - ½
Rob Woolacott 1667 0 - 1
Keith Nevols 1938 0 - 1
Tyrone R Jefferies 1555 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1450 = (7000 + 400 * (0 - 3)) / 4)

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