Event: Division 1

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Opponent Rating Result
Rowland Kerr 1868 0 - 1
Andrew J Donnelly 1858 0 - 1
Rod M Saines 1714 0 - 1
Lee R Osmon 1318 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1490 = (6758 + 400 * (1 - 3)) / 4)

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