Event: Northamptonshire Silver King League

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Opponent	Rating	Result
Andrius Sargautis	1458	½ - ½
Wojciech Augustyniak	0	0 - 1
Tim Broad	1555	½ - ½
John Masefield	0	½ - ½
Aaron Lee	0	½ - ½
Ryan Lack	0	1 - 0
John Edmundson	1240	0 - 1
Sian Crooke	0	0 - 1

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

432 = (4253 + 400 * (1 - 3)) / 8)