The central grey 4x4 is a Latin Square with respect to clue values. Each grey cell must have a clue value from 0 to 3, and clue values in grey cells may not repeat in a row or column.
Enjoy!
Solution code: The clue values in the grey square, read left-to-right, top-to-bottom (16 digits, no spaces)
on 12. February 2024, 04:16 by Tacosian
That was cool, thanks!
on 1. June 2023, 17:34 by glum_hippo
Very pulvy
on 1. March 2023, 19:26 by Phistomefel
Wonderfully minimalistic! Thank you, PulverizingPancake! :)
on 25. February 2023, 04:28 by szabog
Really nice idea. Thank you.
It is funny how it can work.
on 23. February 2023, 22:15 by RockyRoer
Now a 5x5? With one square per row and column left as * which could be anything?
on 23. February 2023, 16:42 by Niverio
Enjoyed figuring the secrets of this cute square :)