Event: North Norfolk Championship (85|10)

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Opponent	Rating	Result
Edward Hackford	1560	0 - 1
Jacob Mulligan	1129	0 - 1
Tony R Larner	1483	0 - 1
David L Jones	1500	1 - 0
Chris Perkins	1748	0 - 1
Richie Allen	1427	1 - 0
Alan F Page	1741	0 - 1
Michael J Gibbons	1864	0 - 1

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

1357 = (12452 + 400 * (2 - 6)) / 8)