In b. 21-22, 25-26 and 30-32 in A1, the R.H. part is in 3/4 time signature, whereas in the L.H. part the regular quaver accompaniment continues in 
time signature (two R.H. bars correspond to one L.H. bar). We number the bars after the L.H. part. After b. 21 and 25, where the endings of the bars coincide, Chopin marked this synchronisation with a vertical, dotted line, combining the bar lines on both staves. In our transcription we reproduce these lines as dashed and add them also after b. 30-31. This is the only example of polymeter in Chopin's music. An analogous difference is present also in the 1st half of b. 32, which we discuss separately.
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category imprint: Differences between sources; Corrections & alterations
notation: Rhythm