Event: Hillingdon Div 2

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Opponent	Rating	Result
Alastair G Johnstone	1610	0 - 1
Mary Helen Deans	1646	0 - 1
Geoff Richards	1386	1 - 0
Phil S Humphry	1536	½ - ½
Bharath Jayakumar	1497	0 - 1
Daniel Evans	1562	0 - 1
David Knight	1694	0 - 1
Ian K Cross	1728	0 - 1
Ian K Cross	1731	½ - ½

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

1377 = (14390 + 400 * (1 - 6)) / 9)