Event: North Norfolk Championship (85|10)

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Opponent	Rating	Result
Edward Hackford	1567	0 - 1
David P Jones	1386	1 - 0
Jacob Mulligan	1143	1 - 0
Chris Perkins	1714	0 - 1
Richie Allen	1412	½ - ½
Alan F Page	1749	0 - 1
Michael J Gibbons	1870	0 - 1
David L Jones	1487	0 - 1

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

1391 = (12328 + 400 * (2 - 5)) / 8)