For the bars with descending thirds, how do I practise to get my thumb bounce across the keys quickly enough, or should I change my entire fingering altogether?
I don't bounce the thumb, I slide the 2nd finger from black key down to white - in fact I use that trick a lot in all kinds of pieces. Busoni called it the '6th finger technique'.
for bars 43 to 464343 4343 4343 4343 | 4343 4343 4343 4343 | 2121 2121 2121 2121 | 2121 2121 2121 2121 | 4343 4343 4343 4343 | 4343 4343 4343 4343 | 2121 2121 2121 2121 | 2121 2121 2121 2121 |
I slide the thumb on all chromatic scales. It is legato, fast, and much easier. I don't know why Chopin didn't write that :-s Im sure he would not have a problem. For bars 11-12 I use43434354343435432121213212121321I STRONGLY advise this fingering. It is much better than Chopin's. The bottom voice can be played perfectly legato at about twice the speed it should go, and you meed to keep the wrist and everything relaxed to allow the hand to go over. You have to practice slowly for a long time looking very carefully at the movements. Let the fingers do the work, and make sure the whole arm is totally free. I put my LH on the RH forearm, and feel to see if I am tense. If I am doing it correctly I can feel no movement in my forarm except for maybe the smallest of twitchs. Let the shoulder feel free...as if you are wiping dust of the keyboard. You must NEVER group it is 4's. Play it in the following groups....3 3 2 2 3 2....then 6 2 2 3 2 then 8 2 3 2 etc..whith accents on the start of the groups...and remove an accent as you get more fluent so eventually you can play it with no accents. Practice it in triplets, sextuplets, 5's, 7's everything. Seperate voices. Also look at the Godowsky studies, and you will find his LH thirds etude preliminary studies very helpful. I don't think I ever have to use my thumb twice in a row once in this piece, I fingered it very carefully. for 43-46 I use 42 31 the whole way. You can fake the legato, it is not possible to get it perfect, but you must create the illusion. Cortot has great adive for this etude. You just have to practice it everyday, for a long time.Learn th RH with the LH as well alongside it....it will do the LH a lot of good!