Event: York Club Championship

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Opponent	Rating	Result
Paul M Barber	0	0 - 1
Daniel Meredith	0	0 - 1
Paul Masiak	0	1 - 0
A Jon Griffith	0	0 - 1
Ian Craig	0	1 - 0
David Wm Smith	0	0 - 1
Norman G Andrews	1709	0 - 1
J Mantovani	0	0(def) - 1
Christopher Dickson	0	0 - 0

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

73 = (1709 + 400 * (2 - 5)) / 7)