4×4×4
(Published on 16. January 2026, 00:31 by juggler)
click on the puzzle image to play
In each quadrant, normal 4x4 Sudoku rules apply, i.e. place the digits 1-4 once each in every row, column, and box.
Red shapes always sum to one of four possible sums, and shapes with the same sum cannot repeat in any row, column, or box of the large 4x4 Sudoku.
See also
Solution code: Row 1 (8 digits)
Solved by Ftown778, cornish-john, Neumino, SKORP17, L00ping007, Atticus837, dzamie, Dinxx, StevenS, luoji, Silverscree, Umar8627, potatojuiceultra, Maxximoo, dorverbin, emoney1374, mellowrobinson, dandydaniel, ... blackjackfitz, abihummel, teuthida, Jastucreudo, seh_bas, Andrewsarchus, AnnikaSof, Supertaster, firespire, rcg, Counterfeitly, widjo, efnenu, appletrapezoid, anthyos, MSDOS, Yawnus, TeddieMilo
Comments
on 17. January 2026, 12:02 by TeddieMilo
Very interesting.. but it took me a while to understand the rules with some experiments.. very nice, tq.
on 16. January 2026, 22:36 by firespire
Very interesting.
on 16. January 2026, 18:40 by blackjackfitz
Huzzah!
on 16. January 2026, 17:14 by HeyItsErin
Trickier than I expected but very fun!
on 16. January 2026, 01:42 by dzamie
Surprisingly nontrivial, and a lot of fun!
on 16. January 2026, 01:26 by Atticus837
What a lovely idea! Not difficult, but very enjoyable to think through.
