Event: Bedfordshire Individual Championship

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Opponent	Rating	Result
R David Cox	1270	1 - 0
Brian J Valentine	1922	0 - 1
David Phillips	1463	1 - 0
Graham E Borrowdale	2006	0 - 1
Thomas P O'Brien	1964	0 - 1
Sumit Bhalla	1407	0 - 1

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

1539 = (10032 + 400 * (2 - 4)) / 6)