Figure 2. (a) On the Tonnetz, F major (triangle 3) is closer to C major (triangle 1) than F minor (triangle 4) is. Consequently, the voice-leading (C, E, G)→(C, F, A) is represented a two-step motion, while it takes at least three steps to represent (C, E, G)→(C, F, A). (b) In actual music, however, F minor frequently appears as a passing chord between F major and C major.

(a) (b)