Event: C Division

Opponent Rating Result
Glenn Trueman 1920 ½ - ½
David Kierman 1750 0 - 1
Julian C Clissold 1724 1 - 0
Jeff Mason 1748 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1786 = (7142 + 400 * (1 - 1)) / 4)

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