Event: Division 2

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Opponent Rating Result
Daniel Pugh 1759 1 - 0
Robert W Stephens 1734 0 - 1
James Irwin 1810 ½ - ½
Alan J Lewis 1533 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1709 = (6836 + 400 * (1 - 1)) / 4)

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