Event: Northamptonshire Silver King League

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Opponent Rating Result
Joshua Morris 0 0 - 1
Ron Cooper 1518 1 - 0
Christopher Keech 1803 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1107 = (3321 + 400 * (1 - 1)) / 3)

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