Rules:
Normal Sudoku rules apply.
Digits separated by a black dot have a ratio of 2:1. Not all possible dots are necessarily given.
All cells with a black dot on at least one edge act as fortress (maximum) cells: Cells with a black dot on an edge must be larger than all orthogonal neighbors of the cell that do not have a black dot on at least one edge.
Lösungscode: Row 8
am 25. Mai 2026, 05:51 Uhr von alarac
using color helped with solving but overall would put it at 2*
am 24. Mai 2026, 03:15 Uhr von CarnacTheMagnificent
Great puzzle. First time solving a puzzle with the Fortress rule. I was amazed how the given information was enough to solve this. Thank you very much for this puzzle. I'm adding this to my favorite puzzle section.
am 23. Mai 2026, 23:00 Uhr von henryng
Neat puzzle! A bit tricky remembering that the fortress rule doesn't apply to other fortresses, though obviously it would be impossible
am 23. Mai 2026, 21:36 Uhr von Pairot
I also think it's a 2*
Very fun, but challenging.
am 23. Mai 2026, 17:24 Uhr von superkinkel
Very nice and very easy after figuring out the break-in. That however is not that easy, so I think it rather borders on two stars.
am 23. Mai 2026, 15:07 Uhr von Franjo
Thank you very much for creating and sharing another unusual (and quite easy) puzzle.
am 23. Mai 2026, 14:12 Uhr von Plok
Great rule set. Once I understood the dynamics of the rule it is fairly easy.
am 23. Mai 2026, 13:01 Uhr von Martina
I really love that rule. Simple and powerful.
am 23. Mai 2026, 10:49 Uhr von Wuschel
Really great puzzle, but I disagree with the very easy rating.
Thank you yttrio!