Event: Division 1

Opponent Rating Result
Kevin D Richardson 2143 1 - 0
Paul S Cooksey 2349 ½ - ½
Clive A Frostick 2125 ½ - ½
Steven A Jones 2378 1 - 0
Steven A Jones 2378 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2355 = (11373 + 400 * (2 - 1)) / 5)

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