Event: Division One

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Opponent Rating Result
Donald J Mason 197 ½ - ½
Jonathan E Swindells 215 0 - 1
Cory S Hazlehurst 179 1 - 0
Darren P Wheeler 208 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

200 = (799 + 400 * (1 - 1)) / 4)

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