Event: Division One

Opponent Rating Result
Keith C Arkell 241 0 - 1
Philip J Holt 209 1 - 0
Eduard N Bulf 171 1 - 0
Neil Clarke 160 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

395 = (781 + 400 * (3 - 1)) / 4)

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