Event: Division 2

Opponent Rating Result
Paul Edwards 1789 1 - 0
Mark D Brougham 1855 0 - 1
Daniel Miller 1765 0 - 1
Maharnab Choudhury 1721 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1583 = (7130 + 400 * (1 - 3)) / 4)

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