Logic Masters Deutschland e.V.

Fortress Fillomino - Dutch Flatmates & Renban (6x6)

(Published on 6. February 2026, 16:45 by ralphwaldo1)




Two versions, based on the same idea, but with different solutions. Version 1 is more solver-friendly; with some clearer logic to eliminate some cases which in Version 2 will require a little visualisation. Play either or both.

Version 1

Version 2


Click on either / each 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.

DUTCH FLATMATES:
• Every 5 in the grid has a 1 above it or a 9 below it (or both).

RENBAN:
• Digits on a purple line are all different and form a set of consecutive numbers (not necessarily in order).

Solution code: The SUM of all digits in row 5, followed by the SUM of all digits in column 5 (4 digits in total) - same solution code works for either puzzle.

Last changed on -

Solved by ThePedallingPianist, salsais, SKORP17, goodcity, mellowrobinson, Calesch, marcmees, sorryimLate, tuturitu, widjo, JustinTucker, Jesper, Calvinball, Mr_tn, bilms, misko, yttrio
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Difficulty:2
Rating:90 %
Solved:17 times
Observed:0 times
ID:000R7C

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Solution code:

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