Two Truths And A Region (FoW)
(Published on 3. March 2026, 17:54 by gdc)
I had the idea of combining "regional constraints" with "two truths and a lie" for a while. Recently Scojo issued a setting challenge where this seemed like a perfect fit. According to testers (thanks everyone!) it should be 4-5 stars for difficulty. Special thanks to ChinStrap for testing it on stream. Hope you enjoy!
Dynamic Fog hides some clues. Placing a correct digit clears fog from its cell and possibly other cells.
Two Truths And A Lie: For each clue type listed below, there are three clues of that type in the grid which don't share cells. Two of them are correct, and one is incorrect ("lying").
Regional Constraints: For each clue type, all cells clued by that type (incl. the liar) contain different digits.
Clue Types: Cages, V, arrows, double arrows, renban, and black kropki (no negative constraints, details in the link).
Visual Examples
A summary of the global constraints: The first five all violate a rule. The last one is allowed.
Related Puzzles
Évier de Cuisine by gdc uses Regional Constraints.
Cagey Architects by ChinStrap and gdc uses Two Truths And A Lie.
We're All Mad Here by gdc is comparable in terms of Foggy Weirdness.
Solution code: Column 8 top to bottom (9 digits)
Comments
on 8. March 2026, 18:00 by LehanLehan
Exquisite work,so many techniques needed to proceed. Thanks so much for the puzzle.
on 6. March 2026, 23:59 by ViKingPrime
You're actually certifiable and I'm here for it.
on 5. March 2026, 22:57 by Norkas
Great fun and nicely themed. What a good puzzle.
on 5. March 2026, 22:56 by BG03
A masterpiece! Very worthy of all the high praise in the previous comments.
on 5. March 2026, 04:33 by Crusader175
Very fun puzzle! Lots of neat interaction!
on 4. March 2026, 12:03 by oskode
Fantastic idea with an even better execution. Thank you very much!
on 4. March 2026, 10:49 by Snookerfan
Great puzzle! Some very nice steps along the way, thanks.
on 4. March 2026, 03:36 by Exigus
Excellent way of combining those rules. Thanks!
on 3. March 2026, 21:54 by Adrian71
Sheer brilliance! Two hours (for me) of challenging but solvable problems, enjoyed it massively!
on 3. March 2026, 21:38 by Mad-Tyas
Amazing puzzle! There are so many lovely ideas.
on 3. March 2026, 20:43 by Visumation
Tested this before it went on LMG. Absolutely loved it. What gem, and what a genius setting. Very hard. But every single step is so fair and beautiful once you spot them. Thanks
on 3. March 2026, 18:18 by ChinStrap
Absolutely loved this one. It is hard yes but the fog keeps the questions focused so every step of the way you aren't feeling lost. The logic was fun fresh and tons of beautiful steps.
on 3. March 2026, 17:58 by Calvinball
An instant classic from gdc, a lot to unpack while feeling fair the entire way through the solve. It's exactly what I wanted it to be and then some.
on 3. March 2026, 17:58 by SennyK
An exceptional puzzle filled to the brim with lovely logic, definitely worth a try!
