mr sneaky2010 I think this is the best violin concerto ever. Mozart's melodic invention is boundless in this piece. Unlike most violin concerti, this one radiates sheer joy throughout, and never squeaks.

Many thanks

It is at the discretion of the performer, not the listener.

@@bartjebartmans Of course. I allways wondered why in competitions the candidates are never asked to compose their own cadenza's. It would be good way of testing their insight in the style of the period.

Christian Wouters I once listened to Mozart's 25th concerto for fortepiano, with cadenzas by Busoni! Needless to say, the overblown, late Romantic style of the cadenzas were totally ineffective and ruined the performance completely!

The cadenza is Ysaye's

Mozart wrote no cadenzas for this (or the other) violin concertos, so there is no score.

Because Mozart forgot to write anything in the viola part in those bars of the autograph. The editor has assumed that he intended to have the violas double the cellos an octave higher.

What😭

Not a bad question. Honestly, as a string player, it depends on what makes the most sense musically and technically. You wouldn't want to shift really high up to reach certain notes, unless it sounds better one way versus another.

Imo you'd want to avoid shifts and unnecessarily high positions as much as possible in classical works by composers such as Mozart. It's much cleaner. It's a bit different in later works (i.e. Brahms, Bruch, Sibelius etc.)