Happy #TowelDay to one and all. I wrote this one last July, but it occurred to me that today might be a good day to release it. Thanks to my test solver. Anything you still can’t cope with is therefore my own problem. Solution and explanations are in the following post.
Scroll down for a browser-solvable version. (There are no “check” or “reveal” buttons, but you will get a confirmation message if you have fully filled in the grid correctly.) Or print off the standard or inksaver versions.