Event: Northamptonshire Silver King League Division 2

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Opponent Rating Result
Ibraheem Bin-Suhayl 0 ½ - ½
Wing Cheng 1676 ½ - ½
Richard N Ellis 1596 0 - 1
Joshua Stojkovic 1295 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1042 = (4567 + 400 * (0 - 1)) / 4)

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