Event: Division 2

Opponent Rating Result
Laurence A Butt 161 0 - 1
Alex Von Der Becke 142 1 - 0
Arjun Kolani 165 ½ - ½
James M Wheeler 156 0 - 1
Robin A Jones 164 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

158 = (788 + 400 * (2 - 2)) / 5)

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