Event: Northamptonshire Silver King League

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Opponent Rating Result
Robert Mills 1338 ½ - ½
Luis Alejandro Vieira 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

669 = (1338 + 400 * (0 - 0)) / 2)

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Opponent Rating Result
Antonio Mura 0 0 - 1
Antonio Mura 0 0 - 1
Ian M Andrews 1353 ½ - ½
Keith A Ball 1593 0 - 1
Dave Archer 0 0 - 1
Rene Butler 1289 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

506 = (4235 + 400 * (1 - 4)) / 6)