Event: North Norfolk Championship (85|10)

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Opponent	Rating	Result
David L Jones	1493	0 - 1
Michael J Gibbons	1883	0 - 1
Jacob Mulligan	1146	1 - 0
Alan F Page	1743	0 - 1
Chris Perkins	1714	0 - 1
David P Jones	1366	0 - 1
Edward Hackford	1634	0 - 1
Tony R Larner	1488	½ - ½

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

1308 = (12467 + 400 * (1 - 6)) / 8)