Event: Northamptonshire Silver King League Division 2

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Opponent Rating Result
Vanik Singh 1560 0 - 1
Daniel Talbott 1512 ½ - ½
Richard N Ellis 1521 0 - 1
Bob McDonald 1562 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1439 = (6155 + 400 * (1 - 2)) / 4)

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