Event: Division 4

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Opponent Rating Result
Mick J Frings 82 1 - 0
Arjuna Mendis 80 0 - 1
Margaret L Gretton 98 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

220 = (260 + 400 * (2 - 1)) / 3)

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