Event: Northamptonshire Silver King League Division 2

Opponent Rating Result
Wing Cheng 1668 ½ - ½
Yugan Suganya 1569 0 - 1
Rene Butler 1475 ½ - ½
Wojciech Augustyniak 1352 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1516 = (6064 + 400 * (1 - 1)) / 4)

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