Event: Durham League Division 1

Opponent Rating Result
Mahmoud Shahbazi 0 ½ - ½
Paul R Bielby 0 0 - 1
Zachary Cansdale 0 1 - 0
Mahmoud Shahbazi 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

0 = (0 + 400 * (1 - 1)) / 4)

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