Event: Northamptonshire Silver King League Division 1

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Opponent Rating Result
Nigel P Young 1870 ½ - ½
Matthew Edwards 1419 ½ - ½
Nicholas J Caldwell 1847 0 - 1
Christopher Keech 1813 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1637 = (6949 + 400 * (0 - 1)) / 4)

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