Event: A Division

Opponent Rating Result
Chris Swales 1736 1 - 0
Stephen Cole 1849 1 - 0
Steven B Booth 1967 0 - 1
Jonathan Sams 1829 ½ - ½
Michael J Creaney 1657 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1888 = (9038 + 400 * (2 - 1)) / 5)

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