Event: League Division 3

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Opponent Rating Result
Sam Kerr 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-400 = (0 + 400 * (0 - 1)) / 1)

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Opponent Rating Result
Simon Bartle 1205 1 - 0
Simon Bartle 1205 1 - 0
Lewis Carroll 1374 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1395 = (3784 + 400 * (2 - 1)) / 3)