Event: Northamptonshire Silver King League Division 1

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Opponent Rating Result
Wojciech Augustyniak 1338 ½ - ½
John Edmundson 1237 0 - 1
Wojciech Augustyniak 1355 ½ - ½
John Edmundson 1248 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1295 = (5178 + 400 * (1 - 1)) / 4)

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