Event: Northamptonshire Silver King League Division 2

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Opponent	Rating	Result
Bob McDonald	1706	0 - 1
John Masefield	1537	½ - ½
Antonio Mura	1758	0 - 1
Conor Hackett	1745	0 - 1
Jonathan Cleghorn	1857	0 - 1
George Gowers	1650	1 - 0
Arrow Morris	1600	0 - 1
Joshua Stojkovic	1401	1 - 0

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

1507 = (13254 + 400 * (2 - 5)) / 8)