This piece presents two important challenges that must be addressed. One is how to play the lines legato. This is the challenge of how to make the lines flow horizontally. The key is to recognize the target note. For example, assume the phrase starting in measure 1 leads to the whole note G in the right hand of measure 2. In that case, the most undesirable outcome is for the preceding four notes, E D C E, to all be played with the same flat volume. Play them so they are led towards G.

Another important challenge is to ensure the independence of the two voices. Even if the goal of the first phrase is the G in measure 2, and that G is the loudest note so far, the E in the left hand of measure 2 is a separate voice and a phrase that is about to begin. This E must not be played loudly, influenced by the right hand. The left-hand phrase starting from measure 2 aims for the whole note G in measure 3, so it should begin softly. Thus, the independence of each voice is also a crucial challenge.