Event: Division 1

Opponent Rating Result
Peter Cloudsdale 156 1 - 0
Mark W White 185 ½ - ½
Tim M Turner 161 ½ - ½
A Jon Griffith 150 ½ - ½
Michael Jackson 175 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

245 = (827 + 400 * (1 - 0)) / 5)

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