Fortress Fillomino - Loop (10x10)
(Published on 14. August 2026, 16:45 by yttrio)
This is my seventh contribution to the series started by ThePedallingPianist.
click image to play this week's Fortress Fillomino
FORTRESS FILLOMINO:
• Divide the grid into orthogonally connected regions and fill each cell with a number (not necessarily single-digit) showing the number of cells in the region to which it belongs;
• Each region must be either strictly larger than all of its orthogonal neighbours or strictly smaller than all of its orthogonal neighbours.
LOOP:
• Draw a one-cell-wide loop of orthogonally connected cells. The loop may not touch itself, not even diagonally.
• Every Fillomino region must be either entirely on or entirely off the loop.
• Numbers in cells with arrows may be either on or off the loop, and count the total number of loop cells in the indicated direction (not including itself).
Solution code: Column 6
Comments
on 8. October 2026, 04:54 by EvanB
very good puzle !
on 25. August 2026, 03:09 by MaizeGator
Smitty's comment about sums up my feelings perfectly
on 19. August 2026, 18:05 by Smitty743
Incredible puzzle. Maybe my favourite entry in my favourite series. Despite never being stuck for more than 2-3 minutes at any point, every single breakthrough and next step felt so rewarding no matter how simple. After learning the "secrets" of Fortress Fillomino, I will never cease to be amazed at how many different rule sets it seamlessly fits into, and just how many more "secrets" exist within each rule set. Thank you!
on 18. August 2026, 10:29 by Flinty
Very nice puzzle! I can imagine this was a lot of fun to set.
on 15. August 2026, 13:24 by amirs
Super fun puzzle. It flowed very smoothly, knowing some Fortress Fillomino tricks (thanks to @ThePedallingPianist for the video), but objectively felt more like 4*.
on 15. August 2026, 13:04 by Franjo
Thank you very much for creating and sharing another wonderful FFF-puzzle. And another great loop puzzle, too!
on 15. August 2026, 07:46 by sorryimLate
Very nice, thanks!
on 15. August 2026, 00:56 by Agent
Cool puzzle with great interactions!
on 14. August 2026, 23:15 by Christounet
Great fun! Thanks :)
on 14. August 2026, 22:54 by marcmees
this was fun. Thanks
on 14. August 2026, 22:05 by Piatato
Awesome!
on 14. August 2026, 17:53 by ThePedallingPianist
This might have been the longest I felt clueless on a Fortress Fillomino so far, but when I started to understand how the interactions worked it flowed beautifully! Another great contribution to the series :)
on 14. August 2026, 17:43 by damo_89
Incredible to find a solved grid given how tightly these constraints interact
Very nice setting
