Event: Worcestershire Championship League

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Opponent	Rating	Result
Daniel M Lambourne	2038	½ - ½
John A Edge	2072	0 - 1
Lee Davis	2086	½ - ½
Peter R Kitson	2043	1 - 0
Lee Davis	2086	0 - 1
Harry G Evans	1878	½ - ½
Mark Riley	1743	1 - 0

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

1992 = (13946 + 400 * (2 - 2)) / 7)