I've now completed my account of the Onitiu Problem, which has featured in these diary pages over the past two years. It forms a third page in the Figured Tours section on my Knight's Tour Notes pages.
https://www.mayhematics.com/t/f3_Onitiu%20Problem.htm
Quite a lot of work there that I'm pleased with, though still a number of gaps, and constructing solutions on larger boards is beyond the limits of my drawing program.
