Event: Division 4

Opponent Rating Result
Chris Willett 1394 0 - 1
Nigel Morris 1510 0 - 1
Simon L Payne 1230 0 - 1
Stephanie Brown 1385 0 - 1
Omar Ahmed 1223 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

948 = (6742 + 400 * (0 - 5)) / 5)

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