Event: Division Four

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Opponent Rating Result
Imogen Dicen 114 ½ - ½
Ken Wise 111 ½ - ½
Michele J Clack 108 ½ - ½
Windsor WA Peck 117 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

13 = (450 + 400 * (0 - 1)) / 4)

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