Event: Division One

Opponent Rating Result
Daniel B Rosen 2124 ½ - ½
Mark Josse 2228 1 - 0
Thomas B Bonn 2270 1 - 0
Peter G Large 2395 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2354 = (9017 + 400 * (2 - 1)) / 4)

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