Wildfire
(Published on 25. January 2026, 14:01 by Firebird)
Rules:
Sudoku: Normal sudoku rules apply.
Wildfire:
- All cells with a given digit are on fire.
- Fire spreads between orthogonally adjacent cells if (and only if) the difference between their digits is 3 or less. The spreading fire creates orthogonally connected 'fire regions'.
- A given digit indicates the size of the fire region it is in.
- Digits may not repeat in a fire region.
- Cells containing a house may not be on fire.
Solution code: Row 1, from left to right
Comments
on 2. February 2026, 02:09 by sparkymanu
Very fun and creative! The implication of the spreading really made this interesting!
Thank you so much for sharing
on 26. January 2026, 14:14 by Exigus
Very interesting ruleset and really nice puzzle. Thanks!
on 26. January 2026, 12:28 by abadx
Really nice flow. Very creative and challenging (at least from my point of view). I was stuck in middle game (those small wildfires on top were a nightmare), but with perseverance I was able to success.
on 26. January 2026, 07:11 by Elliott810
Brilliant puzzle! Thank you:)
on 25. January 2026, 21:10 by gdc
Nice one
on 25. January 2026, 16:21 by Qodec
I'm glad the houses survived. That was a close call.
