Event: Division One

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Opponent Rating Result
David J Pritchard 173 0 - 1
Thomas D Robinson 175 ½ - ½
Martin D Smyth 167 0 - 1
David Thomson 165 0 - 1
Cory S Hazlehurst 169 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-150 = (849 + 400 * (0 - 4)) / 5)

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Opponent Rating Result
Mike J Groombridge 128 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

528 = (128 + 400 * (1 - 0)) / 1)