Fortress Fillomino - Index Lines (6x6)
(Published on 13. January 2026, 18:56 by ThePedallingPianist)
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!
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.
INDEX LINES:
• A value, V, in the Nth cell of a turquoise line (starting from the diamond) indicates that the Vth cell contains the value N.
Solution code: Column 1 (far left), top to bottom (6 digits)
Comments
on 1. February 2026, 22:56 by ThePedallingPianist
Dth to Vth
on 29. January 2026, 07:57 by samjna0049
Hey, thanks for the amazing puzzle as usual. Did you forget to change the "Dth" to "Vth" in the updated rule of index lines?
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Oops good point, thank you! And thanks for solving! :)
on 20. January 2026, 19:51 by ThePedallingPianist
Rules updated as per Nell's point! (Previously Index lines referred to digits rather than values)
on 20. January 2026, 01:19 by Nell Gwyn
I got sidetracked with wondering if a two-digit number on an Index line could count its two digits separately ^_^; But eventually I reasoned the grid would probably be larger if that were the case... I might play around with that double-digit idea though!
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TPP: That's a very good point and honestly not one I considered well enough when writing the rules! I'll reword... but also, yes - that would make for a very interesting alternative ruleset! Thanks for streaming it! :)
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 :)
