Event: Barclays Chess Club Rapid Tournament No. 2/2012

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Opponent	Rating	Result
Daniel Lindner	0	0 - 1
John Durrans	0	1 - 0
Paul Dent	0	1 - 0
Mark S Gray	0	0 - 1

performance = (sum(opponents ratings) + 400(wins-losses)) / games

0 = (0 + 400 * (2 - 2)) / 4)