Event: Division 3

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Opponent Rating Result
Ian P F Smith 1501 1 - 0
Ian P F Smith 1501 0 - 1
Andrew Offord 1626 ½ - ½
Vladimir Chtym 1471 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1425 = (6099 + 400 * (1 - 2)) / 4)

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