Event: York Club Championship

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Opponent	Rating	Result
A Jon Griffith	1808	½ - ½
Ewen Miller	1799	0 - 1
Will Orpin	1135	1 - 0
David Wm Smith	1736	1 - 0
Aaron Rich	1864	0 - 1
Paul Masiak	1400	1 - 0
Jack Howorth	1634	1 - 0
Paul M Barber	1942	0 - 1

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

1715 = (13318 + 400 * (4 - 3)) / 8)