Q:

Advice on fingering and hand position

I am practicing left hand of the following peice on piano. It needs to be played relatively fast with fingers spanned over an octave, involving D3, G3, B3b, D4. Any advice on how to position my hand for best performance?

A:

I would use a fingering like this:

Update:

in terms of hand position, you will have some kind of rotation, bending when playing in this octave some kind of ) shape from you forearm to your fifth finger tip.
I would not play this with flat fingers, since it should be played fast I would keep my fingers as round as possible.
the vertical position I would have my fifth finger on the D3 right in the first section between C# and D#, the third finger rather towards the end of G3 the second finger almost in the middle of B3b and the first finger on D4 rather at the front bit of the key, definitely not between the black keys.

