I’ve arranged Blue in Green, a ballad by Bill Evans and Miles Davis. My solo piano arrangement primarily uses a 2+3 approach—two notes in the left hand and three in the right—often adding color tones such as the 9th, 11th, or 13th for extra richness. In basic 2+2 chord arranging—two notes in the left hand and two in the right—the left hand anchors the harmony, typically playing intervals such as root and 7th, root and 3rd, or root and 5th on tonic chords. The right hand’s thumb completes the chord (with the 3rd or 7th), while the remaining fingers carry the melody above.