Event: Combined Banks and Insurance Chess League 2010-11

Opponent Rating Result
Gerald F Parfett 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

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

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Opponent Rating Result
Jean-Baptiste Jugand 0 0 - 1
Carl J Hetherington 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-400 = (0 + 400 * (0 - 2)) / 2)