Event: Division One

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Opponent Rating Result
Peter M Collins 155 ½ - ½
Cory S Hazlehurst 169 0 - 1
Gordon G Sands 111 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

145 = (435 + 400 * (1 - 1)) / 3)

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