Event: Northamptonshire Silver King League Division 2

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Opponent Rating Result
Ron Cooper 1472 0 - 1
Kirk Harrison 1706 0 - 1
John Thomson 1741 1 - 0
Jimmy Blair 1529 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1512 = (6448 + 400 * (1 - 2)) / 4)

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