手指定位训练--从一个论坛读到的

A good "leaping" exercise is to start with both thumbs on middle C. Then play the B below and the D above with your thumbs, and jump back to C. Then have them jump apart again with the left hand jumping down to the A, while the right hand jumps up to the E. This keeps going on and moving outwards. This isn't so much for "blind" jumping, as you should look and prepare mentally before leaping each time, but you could use it "blind" as well. Just make sure that you completely relax your entire arm after each and every leap, and you will build more and more tension as you get further and further from C, if you don't consciously relax each time.

Now with your pieces, practice thumbs only in the left hand. If it's an octave, ignore the pinky's note, and just play the thumb. Then if it goes to a chord, again just play the thumb. If your thumbs can land it, your other fingers will follow. Once this is mastered you can add your other fingers back in one at a time, or all at once if you can manage that right away. Once again, this isn't really for blind leaping, but for accurate leaping. That said, I have done this "blind" as well when I had octaves jumping around, and it worked out fine, but they weren't huge leaps. (If I were playing a piece like that, I would probably be playing my right hand "blind" and watching my left - but it's good that you are trying to get a "feel" for it as well).

The last thing is definitely not for playing blind, but for playing 100% accurate. Position your hand above the chord or octave you are going to play, but don't press down. Then look ahead to the next one. Then, when you are ready, press down, and jump quick to the next chord as though you are totally ready to play it (fingers all in position), but don't press. Look ahead to the next chord/octave, and repeat the process - Press, jump/position, look, press, ect. Always, completely relax your hand, arm, and shoulder while looking. You are training your body to relax while you play that way, and are avoiding potential injuries caused by tension. You would be amazed how much tension we can have when we "think" we are relaxed, so really make sure you are completely tension free before proceeding.

One last thought. If you are getting it right 60% of the time, that means you are training your arm, and fingers to play it wrong during the other 40% of the time. Watch your left hand, and not your right until you can play it 100% of the time. Then if you wish to play without looking at your left hand, do so a chord at a time, and make sure you can get it right 99% of the time before playing another chord blind. Perhaps do it three times while looking, then once without. This is just what I would do personally, but that could be due to the lectures I get about "practicing mistakes!"