Event: Division One

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Opponent Rating Result
Dimitar Mogilarov 200 0 - 1
Philip J Makepeace 192 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-4 = (392 + 400 * (0 - 1)) / 2)

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Opponent Rating Result
Ed Stembridge 159 1 - 0
Dashiell L Shaw 201 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

180 = (360 + 400 * (1 - 1)) / 2)