Event: North Norfolk Championship (85|10)

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Opponent	Rating	Result
Chris Perkins	1680	0 - 1
Richie Allen	1433	1 - 0
David P Jones	1379	0 - 1
Edward Hackford	1605	0 - 1
Jacob Mulligan	1148	1 - 0
Michael J Gibbons	1866	0 - 1
Alan F Page	1753	0 - 1
Tony R Larner	1481	1 - 0

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

1443 = (12345 + 400 * (3 - 5)) / 8)