Event: York Club Championship

PDF Excel

Opponent	Rating	Result
Aaron Rich	1658	0 - 1
Jack Howorth	1610	0 - 1
John Foo	1469	0 - 1
Paul Masiak	1405	0 - 1
Will Orpin	960	1 - 0
Philippe Radault	1567	0 - 1
Norman G Andrews	1604	½ - ½

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

1239 = (10273 + 400 * (1 - 5)) / 7)