Event: Division 3

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Opponent Rating Result
Kacper Drukarczyk 1680 0 - 1
David M Cotterell 1561 ½ - ½
Peter Stiff 1558 0 - 1
Peter Stiff 1600 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1300 = (6399 + 400 * (0 - 3)) / 4)

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