Impregnable
(Published on 29. July 2026, 00:21 by HalfBakedLunatic)
Impregnable: A fortified position; unable to be captured or broken into.
The Rules:
• Normal Sudoku Rules apply
• Digits along an arrow sum to the digit in the circle
Solve Online here (right-click and open in new tab):
Impregnable (Sudokupad)
Leave a comment and let me know how you like it!
Puzzle by David Workman (aka "HalfBakedLunatic") with Special thanks to Kevin Amaro for the idea!
The Rules:
• Normal Sudoku Rules apply
• Digits along an arrow sum to the digit in the circle
Solve Online here (right-click and open in new tab):
Impregnable (Sudokupad)
Leave a comment and let me know how you like it!
Puzzle by David Workman (aka "HalfBakedLunatic") with Special thanks to Kevin Amaro for the idea!
Solution code: Box 5 (top left to lower right)
Last changed on on 30. July 2026, 00:11
Solved by jmw, jordanza, bansalsaab, Bubbalubba, blueberrypug, xiaozhu, jalebc, bigdave, Saltensity, Chelo, Snookerfan, Elliott810, karen_birgitta, Marshal on Mars, NeroChaos, mbrandtwls, BobAndWeave, Gunkan, ... jeffrey.l.byrd19, pmatos, prodigis, SKORP17, Adrian71, Jagga, alexsmart, Piff, OlafLemme, lune, Fenn, lina_hyena, WenVo, Arheus, Grey, Julianl, slowcloud, BorisTheSnake, Crul, kaiserbykaiser
Comments
on 29. July 2026, 14:29 by BobAndWeave
That's insane! Took me almost two hours, but I managed to break through the fortified position. Very difficult.
Last changed on 29. July 2026, 13:36
on 29. July 2026, 11:33 by Marshal on Mars
Can you clarify if the gray arrow originating from R5C6 terminates in R6C8? There isn't a visible arrow-tip for it.
edit: I proceeded assuming that it's meant to go into R7C8 and that seemed to work.
--- Yes, that is correct!
on 29. July 2026, 09:13 by Snookerfan
Lovely, also 2.5 stars for me. Thanks!
on 29. July 2026, 04:46 by blueberrypug
very nice, but closer to 2.5 for me
