Event: Division 1

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Opponent Rating Result
David J Redman 181 1 - 0
Paul Cumbers 192 0 - 1
David H Coates 172 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

315 = (545 + 400 * (2 - 1)) / 3)

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Opponent Rating Result
David H Coates 172 1 - 0
Brian M Hayward 141 0 - 1
Janos J Wagenbach 138 1 - 0
Neil Graham 150 1 - 0
Mike Herbert 130 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

386 = (731 + 400 * (4 - 1)) / 5)