I realized that for some posts I may have used “Kempe loops” and “Kempe cycles” to describe closed “Kempe chains”, that in other words form closed paths (cycles). I think it would have been better always to use “Kempe cycles”.

https://en.wikipedia.org/wiki/Loop_(graph_theory)

https://en.wikipedia.org/wiki/Path_(graph_theory)

https://en.wikipedia.org/wiki/Hamiltonian_path