Event: Northamptonshire Silver King League Division 2

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Opponent Rating Result
Arrow Morris 1651 0 - 1
Christopher Keech 1805 0 - 1
Dave Archer 1653 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1436 = (5109 + 400 * (0 - 2)) / 3)

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