Event: Division One

Opponent Rating Result
Marek J Soszynski 164 0 - 1
Alan K Crombleholme 172 0 - 1
Darren H Whitmore 168 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-99 = (504 + 400 * (0 - 2)) / 3)

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