Event: League Division 2

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Opponent	Rating	Result
Richard Sanger	1679	1 - 0
Paul Hardy	1543	0 - 1
Jonathon Day	1543	0 - 1
Steve Collins	1283	1 - 0
Peter F Mason	1830	0 - 1
Richard Sanger	1679	0 - 1
Peter F Mason	1830	0 - 1
Tom Devlin	1503	0 - 1
Chris Hare	0	½ - ½

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

1254 = (12890 + 400 * (2 - 6)) / 9)