txtDefinition=The name given by nineteenth-century writers to Mozart\'92s {\uldb String Quartet}{\v 154839} in C {\uldb major}{\v 86320}, {\uldb K.}{\v 137211} 465, the last of the six {\uldb \'93Haydn\'94 Quartets}{\v 136342}. This nickname derives from the highly {\uldb chromatic}{\v 77395} {\uldb introduction}{\v 138212}, whose sudden shifts of {\uldb harmony}{\v 84040} are bolder than any of its actual {\uldb dissonances}{\v 80063}. Some critics found Mozart\'92s abrupt {\uldb modulations}{\v 88241} and {\uldb part-writing}{\v 90714} at the opening so offensive that they were compelled to \'93correct\'94 the {\uldb passage}{\v 90954}.
