As for Variation 39, check your left-hand position, and practice the chords separately. For instance you could practice the bottom 2 notes as double stops and then the middle two and then the upper two notes. Use silent practice and tap the fingers from the air onto the string to make sure that the finger fall is reliable. Some of the chords are more challenging than others
Like Variation 39, the whole arm needs to move freely from the shoulder joint and we can extend the length of the bow stroke (for playing more loudly) by use the forearm from the elbow joint.
As with variation 39, the variants show a wide range of challenges for our ricochet and A fast bowstroke where the hair stays in contact with the string while the stick bounces. strokes. It’s well worth the effort for two reasons – to extend technical fluency, and to keep our minds focused and ‘alive’ during practice. See ‘Introduction to practice’ for a discussion of developing expertise and the need to continually challenge ourselves when practicing technical work.
Practice with a A pause between groups of notes. This is inserted to monitor the group of notes just played and/or program the next group before the last up bow so that we focus on the changes of bass note. Like the cadenza in the Mendelssohn E Minor violin concerto the bass notes are important in adding resonance and making the musical line clear.