Event: Division 1

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Opponent Rating Result
Nigel Birtwistle 202 0 - 1
Shabir Okhai 198 0 - 1
Michael A Naylor-Eade 169 0 - 1
Michael A Naylor-Eade 169 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-216 = (738 + 400 * (0 - 4)) / 4)

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