Event: Christmas Rapidplay

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Opponent Rating Result
Stefan Winman 1152 1 - 0
John Grant 1538 1 - 0
Peter J Leary 1714 0 - 1
David Jarvis 1515 0 - 1
Shriya Pillay 1608 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1585 = (7527 + 400 * (3 - 2)) / 5)

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