A short note about how the coordinates work would also be helpful, or just highlight the target square, because not everyone knows chess notation by heart. I tried two different interpretations (both wrong) before finally resolving to google for it.
I am going to agree, and hopefully clarify the point with a slightly different example. While I know how the notation works, I cannot figure out where a particular square is at a glance. This meant a lot of time squinting at the tiny, low contrast labels at the edges of the board. It made the problem a lot harder to solve since my concentration was constantly being disrupted by figuring out where the next destination is, rather than focusing upon the pattern of the knight's moves.
(I see now that the target-square notation is much more prominent if you stretch the window horizontally, but I habitually use portrait-mode windows, where it's very small.)