Event: Division 3

Opponent Rating Result
Jonathan Ellinsfield 1532 1 - 0
Graham J Gibson 1627 ½ - ½
Nader Nader 1500 1 - 0
Mehdi Letlat 1400 0 - 1
Keith W Roper 1655 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1543 = (7714 + 400 * (2 - 2)) / 5)

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