Event: Durham League Division B

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

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

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Opponent Rating Result
Thomas Marwood 1450 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1850 = (1450 + 400 * (1 - 0)) / 1)