Event: Northamptonshire Silver King League Division 2

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Opponent	Rating	Result
Romilly Ilersic	1855	½ - ½
John Thomson	1760	0 - 1
Ron Cooper	1453	½ - ½

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

1556 = (5068 + 400 * (0 - 1)) / 3)