Event: North Norfolk Championship (85|10)

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Opponent	Rating	Result
David P Jones	1403	1 - 0
Richie Allen	1426	0 - 1
Tony R Larner	1491	0 - 1
David L Jones	1488	0 - 1
Chris Perkins	1746	0 - 1
Edward Hackford	1638	1 - 0
Alan F Page	1747	0 - 1
Michael J Gibbons	1868	0 - 1

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

1401 = (12807 + 400 * (2 - 6)) / 8)