Event: Division Four

Opponent Rating Result
David Smith 145 1 - 0
Simon A Killarney 131 0 - 1
John Davis 135 ½ - ½
Stephen R Wilcox 148 1 - 0
Gavin Maciel 145 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

301 = (704 + 400 * (3 - 1)) / 5)

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