Event: Worcestershire Championship League

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Opponent	Rating	Result
Nigel Hosken	2081	½ - ½
Brian Turner	1972	1 - 0
Nigel Hosken	2081	1 - 0
Mark Bethel	1810	½ - ½
David Spowart	1771	½ - ½
Phil Austin	1734	½ - ½
Joe Rastall	1831	½ - ½

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

2011 = (13280 + 400 * (2 - 0)) / 7)