Fault Lines
(Published on 8. February 2026, 11:54 by Clockwork)
Normal Sudoku rules apply
The set of all cells containing the digits 1-6 forms a single, contiguous region, and every 2x2 square contains cells within and outside that region.
Digits may not repeat in a killer cage, and the digits in each cage must sum to the given total.
Solution code: Top row, left to right
Comments
on 11. February 2026, 05:34 by Chefofdeath
The 2x2 logic in this felt a lot like a global entropy puzzle but less restrictive! I really enjoyed this! Awesome puzzle :)
on 11. February 2026, 00:07 by damo_89
Very fun, the shading rules do a lot of work
on 10. February 2026, 21:54 by KyleBaran
Felt nonstandard for rules, but was an extremely excellent puzzle
on 9. February 2026, 22:37 by dzamie
Pretty cool semi-YY puzzle! The connectivity rule tripped me up a bit, but was also very helpful when I remembered it.
on 9. February 2026, 15:24 by Kavvy
What a delightful puzzle. Really enjoyed that. Thanks!
on 9. February 2026, 11:55 by Titus Adduxas
I thoroughly enjoyed that - a really smooth flowing puzzle - thanks for sharing.
on 9. February 2026, 04:01 by Redmuunk
Very smooth and enjoyable puzzle, 33 minutes for me. I would like to try the same rule set with a higher difficulty (3*) rating, if anybody knows of one. Thank you Clockwork.
on 8. February 2026, 22:27 by rojspencer
Excellent!
on 8. February 2026, 22:23 by gdc
Fun
on 8. February 2026, 21:27 by wuc
Agree. Great setting thx.
on 8. February 2026, 20:21 by ghostmary
What a fantastic combination of rules! Thanks for sharing :)
on 8. February 2026, 20:09 by henryng
Terrific puzzle!!
on 8. February 2026, 20:00 by firespire
Got a bit stuck near the end forgetting connectivity which I struggle to see in my head and need to write out. All good in the end.
on 8. February 2026, 18:50 by tallcat
Delightful!
on 8. February 2026, 17:09 by pjot
Beautiful!
on 8. February 2026, 16:51 by Exigus
Cool concept and a very enjoyable solve.
on 8. February 2026, 15:30 by CallindorCray
I had an hour of fun solving it. Thanks!
on 8. February 2026, 14:55 by CallindorCray
I had an hour of fun solving it. Thanks!
