Fortress Fillomino 1 - Index Lines
(Published on 13. January 2026, 18:56 by ThePedallingPianist)
Fortress Fillomino Fridays
Yes, I'm aware this first edition was not published on a Friday! This was originally a response to a Setting Saturdays prompt from Scojo, but after setting this I realised I'd stumbled upon a very fun genre, so I'm challenging myself to make a little series out of it!
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.
INDEX LINES:
• A digit, D, in the Nth cell of a turquoise line (starting from the diamond) indicates that the Dth cell contains the digit N.
Yes, I'm aware this first edition was not published on a Friday! This was originally a response to a Setting Saturdays prompt from Scojo, but after setting this I realised I'd stumbled upon a very fun genre, so I'm challenging myself to make a little series out of it!
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.
INDEX LINES:
• A digit, D, in the Nth cell of a turquoise line (starting from the diamond) indicates that the Dth cell contains the digit N.
Solution code: Column 1 (far left), top to bottom (6 digits)
Last changed on on 16. January 2026, 10:22
Solved by The Book Wyrm, maniacaljackal, SKORP17, tiuhto, mellowrobinson, marcmees, tuturitu, Jesper, Neumino, Calesch, ralphwaldo1, Myxo, KNT, Exigus, Mark Sweep, aqjhs, webato, Andrewsarchus, Scojo, gdc, palpot, Gnubeutel, smckinley, OJPS, JustinTucker, Geb, HerrEks, Counterfeitly, Tompzini, Ratfinkz, widjo
Comments
on 16. January 2026, 10:22 by ThePedallingPianist
Introduction to the series
on 14. January 2026, 19:36 by aqjhs
super cute ^-^
on 14. January 2026, 11:31 by Myxo
Amazing!
on 13. January 2026, 21:30 by mellowrobinson
Fascinating! The fortress rule works so nicely, I'm hoping for a larger sequel :)
