Fortress Fillomino - Black Kropki [neg] (9x13)
(Published on 31. July 2026, 16:45 by Christounet)
I am happy to share my first contribution to the series started by ThePedallingPianist. I had the idea of this puzzle after solving this puzzle by yttrio. There will be no doubt some familiar patterns for those who already solved that puzzle.
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.
BLACK KROPKI (NEGATIVE CONSTRAINT):
• Numbers in cells separated by a black dot are in a 1:2 ratio.
• Negative constraint: all possible black dots are given.
Alternate link to play on Penpa
Solution code: Column 1
Comments
yesterday, 04:01 by MaizeGator
Another standout. I really enjoyed both negative constraint puzzles. Several really great steps in this one
on 3. August 2026, 22:59 by Flinty
Very nice! :)
on 3. August 2026, 22:24 by Piatato
Very nice!
on 1. August 2026, 10:48 by marcmees
very nice. Thanks
on 31. July 2026, 22:06 by KNT
Awesome ending!!
on 31. July 2026, 20:48 by cyddrdrd
So smooth and rewarding once I figured out the indication of this ruleset!
on 31. July 2026, 20:28 by yttrio
Awesome to see this done with black Kropki dots! Maybe negative XV is up next...
on 31. July 2026, 18:04 by ThePedallingPianist
Great to have you on the series, super puzzle with very satisfying deductions right to the end!
on 31. July 2026, 17:20 by kasperd
Getting started was a bit tricky. But once I remembered the secrets I learned from solving yttrio's puzzle it was quite smooth.
I rate this puzzle at two stars of difficulty. Very nice puzzle.
