Sierpiński Fortress
(Published on 21. March 2026, 08:00 by Kaktuslav)
Link to SudokuPad: https://sudokupad.app/sh0iefko6b
Rules: Normal sudoku rules apply. Fortress: Each grey cell is a fortress cell: its digit is greater than each orthogonally adjacent non-grey cell. XV: Cells separated by an X sum to 10. Cells separated by a V sum to 5. Not all possible Xs and Vs are given.
Rules: Normal sudoku rules apply. Fortress: Each grey cell is a fortress cell: its digit is greater than each orthogonally adjacent non-grey cell. XV: Cells separated by an X sum to 10. Cells separated by a V sum to 5. Not all possible Xs and Vs are given.
Solution code: Row 1
Last changed on -
Solved by vollbesonderbar, byeler, dickey, Elliott810, Debba, pepe74287, mathhead, protheph, Piff, Exigus, muule, synth, emoney1374, dellC, Xanda, AlSina, Postnormal, GeorgeTheToad2, Prince Joffrey, x3y2z1, ... IamNumberN, dorverbin, Reina, St9, lefond, terbe1591, Morgenstern, dittberner, pseudomonas, jeffrey.l.byrd19, MixedMathialArts, Photyne, timww572, afuchs0123, Selsted, RadchenkoAleksandr, VWaldstein
Comments
on 24. March 2026, 15:31 by Klausku
Beautiful construction. Thanks!
on 24. March 2026, 11:20 by kasperd
Today I learned there is a fractal named the Sierpiński carpet. And the fortresses in this puzzle are roughly the complement of that fractal.
on 23. March 2026, 09:32 by Crusader175
Fun puzzle!
on 22. March 2026, 13:38 by Franjo
Thank you very much for creating and sharing another beautiful puzzle. Amazing setting!
on 21. March 2026, 19:51 by greemi01
enjoyable puzzle
on 21. March 2026, 13:15 by muule
I enjoyed the break-in and nice flow afterwards
on 21. March 2026, 10:40 by Elliott810
Beautiful puzzle! Thank you:)
