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Using websites of Swedish public sector organizations and automated accessibility checking tools, we both assess to which degree those websites achieve the legal requirements and which limitations the used tools have. Our results show that the median number of unique violated success criteria is only two or less for most tools, but the tools cover only one sixth of all WCAG success criteria. Tools differ in their assessments due to several reasons, such as the size and complexity but also inconsistency of WCAG and related documentation (\u2018techniques\u2019), and typical software engineering problems in the corresponding implementations. 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