Hi Jairo,
You sent a message last year about your Sudoku module, and today, out of curiosity, I wanted to test it. Unfortunately it stops with an error message at line 76 of the file t-sudoku.mkiv, where you have:
\def\sudokufunction_direct[#name][#parameters]#content
I would appreciate if you could tell me whether you have a working version of you module, or what one has to change in order to typeset your examples.
Best regards: Otared