The faculty of mathematics of the prestigious American Rutgers University has published on its website a section containing several KUBOK numerical logic games.
In particular, a specific software, edited by the mathematician Doron Zeilberger, has generated hundreds of grids similar to KUBOK 16 (whose grid measures 4×4), arriving at generating grids of extension 7 (rows) x 7 (columns).
Below are the reference links:
https://sites.math.rutgers.edu/~zeilberg/Kubok/Kubok.html
