Event: Division Five

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Opponent Rating Result
Eamon Murphy 1326 1 - 0
Tony Plackowski 1255 ½ - ½
Richard F Collett 1342 0 - 1
Nathan Harrison 1200 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1181 = (5123 + 400 * (1 - 2)) / 4)

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