Express Stave by John Keller

My preferred version of Express Stave, is the ‘reverse colour’ version, where the naturals (white keys on a piano) are represented with black note-heads, and the black keys (sharps and flats) have white note-heads. See the following PDF files for illustration:

Beginner piano method:

Here are the links to this website’s descriptions of the three versions of Express Stave:

The following ES guide shows some of its properties, terminology and coding:

Some YouTube tutorials:

Free PDF files of piano music in Express Stave notation (reverse color):