Event: Division 2

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Opponent Rating Result
Alan M Jex 1833 0 - 1
Barrie D Cooper 1608 1 - 0
Arthur Townsend 1650 1 - 0
David J Walton 1615 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1877 = (6706 + 400 * (3 - 1)) / 4)

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