Event: A Division

Opponent Rating Result
Stephen W Dauber 178 ½ - ½
Nicholas Tavoularis 203 0 - 1
Chris N Ross 211 0 - 1
Giuseppe Magazzu 159 1 - 0
Stephen W Dauber 178 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

106 = (929 + 400 * (1 - 2)) / 5)

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