Event: City Chess League 2014-15

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Opponent Rating Result
Zsolt Berend 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

400 = (0 + 400 * (1 - 0)) / 1)

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Opponent Rating Result
Johan Rydahl 0 0 - 1
Simon M Pallister 0 1 - 0
Widianto Siek 0 0 - 1
Tuyaara Pakhomova 0 0 - 1
Ian N Heppell 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-240 = (0 + 400 * (1 - 4)) / 5)