(Dear Divinity, at times, I loathe the spell check in this machine).
I can never quite decide which is more embarrassing, my own typos or the over-eagerness of the spell check to interpret my next tap on the spacebar as approval of whatever nonsense it elected to make of my most recent mistake. Meanwhile I meant no such approval, was just racing ahead with my usual approach to typing, full speed ahead and proofread it later... maybe.
On your latest music picks this evening, I too love Mozart's D minor piano concerto, the #20.
That's one of the ones for which Mozart didn't write a cadenza for the first movement. It's always interesting in a concert (or a new recording) to see if a performer picks a well known cadenza, has penned an original or actually elects to improvise in performance. I think the most commonly chosen ones for Mozart's #20 are by Beethoven and by Brahms.
I was surprised to learn that the composer and classical / jazz pianist Chick Corea once improvised a cadenza for Mozart's #20 in a collaborative recorded performance (1996:
The Mozart Sessions). The recording was done with Corea at piano and with jazz vocalist and conductor Bobby McFerrin , featuring their take on Mozart's #20 and #23 plus the adagio from #2. File under "you just never know."
Anyway if a pianist wants to use the Corea cadenza for Mozart's #20 again, he'll have to reverse engineer the score for it so to speak, as Corea just did what jazz players do and created a riff on the fly. I have not heard these performances, so no clue what they were like. I read that save some improvised introductions they were pretty standard fare. I suppose the orchestra used for the occasion may have made that more or less necessary. It's one thing to sit there and watch a pianist wing any cadenza, but quite another for an orchestra to follow a jazz artist's flights of fancy with the body of a classical concerto. Not to say Corea's not a contemporary classicist regarding some of his own compositions. But getting an orchestra to ditch time-honored ways of playing Mozart's #20, well... probably not gonna happen without a bigger budget for such a recording.