Event: Northamptonshire Silver King League Division 2

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Opponent Rating Result
Richard N Ellis 1572 1 - 0
Joshua Stojkovic 1478 1 - 0
Jim Sorrie 1518 1 - 0
Alistair Mair 1399 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1892 = (5967 + 400 * (4 - 0)) / 4)

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