Event: Northamptonshire Silver King League Division 2

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Opponent	Rating	Result
Vanik Singh	1663	0 - 1
Omar Oliveri	1721	1 - 0
Rene Butler	1462	1 - 0

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

1749 = (4846 + 400 * (2 - 1)) / 3)