Whisper Cave Sudoku
(Published on 19. May 2022, 08:53 by KNT)
Shade some cells such that all unshaded cells are orthogonally connected and all orthogonally connected groups of shaded cells touch the perimeter of the grid. No 2x2 area may be shaded, and adjacent shaded cells must differ by at least 5.
A cell with a number in its top left corner is not shaded, and indicates the sum of all unshaded cells seen in all four directions (including itself), where shaded cells obstruct vision. Within the field of vision of a clue, numbers must not repeat.
A 1-6 example is provided. In this puzzle adjacent shaded cells differ by at least 3.
Solution code: Column 9
Comments
on 22. August 2022, 12:07 by Piatato
Very nice! I enjoyed it thouroughly.
on 4. June 2022, 17:14 by Crusader175
That was very hard, but absolutely beautiful puzzle! Really loved that ending part.
on 27. May 2022, 18:14 by StephenR
Brilliant puzzle, thanks. Some lovely logic arising from the GW constraint. I got horribly snarled up at one point because I forgot a bit of wall was already connected to the edge, and was trying to do it again.
on 22. May 2022, 18:25 by Niverio
Very cool.
on 21. May 2022, 19:58 by MagnusJosefsson
Very nice! I always love a good cave puzzle, and this one was great with some elegant whisper logic adding a twist.
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Thanks, Magnus! I am glad I am able to bring fresh things to the table for a veteran solver like yourself.
on 21. May 2022, 08:08 by peacherwu2
A true adventure while the suspense builds up. Brilliant puzzle!
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I am glad this was an adventure for you, peacherwu2!
on 21. May 2022, 08:03 by peacherwu2
A true adventure while the suspense builds up. Brilliant puzzle!
on 20. May 2022, 20:07 by Dag H
Beautiful puzzle, very difficult!
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Thank you, Dag H!
on 20. May 2022, 12:27 by Christounet
Very nice combination of rules, which offers a great sequel to Abed Hawila's cave puzzle. Something familiar, yet a good feeling of novelty. Also, what a beautiful ending with that slight change in the solving process ! Thanks !!
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I am glad I managed to capture that familiar feeling, but present it in a novel way.
on 20. May 2022, 06:19 by Agent
Great puzzle! This is a cool variation of cave sudoku. It wasn't easy, but the deductions were rewarding and fair. I liked how the walls got resolved at the end.
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Thanks, Agent!
on 19. May 2022, 21:00 by ___
appreciated the way the end resolves. i was stumped for a bit, but heard the echoes on the cave walls. thanks again KNT!
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I'm glad you enjoyed the ending! It took a while to set :)
on 19. May 2022, 15:15 by LittleBallOfPurr
Woo hoo, my first Cave Puzzle, that was a lot of fun. I enjoyed the combination of rule types, I did get bogged down a few times until I remembered one of them.
Awesome puzzle, hope Simon ends up doing a video on this, thanks so much <3
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thank you for the kind words!
on 19. May 2022, 15:06 by kolot
Very nice puzzle as usual!
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And thank you for solving, as usual :-)
on 19. May 2022, 11:46 by Vebby
Lovely! :)
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Thanks Vebby :)
on 19. May 2022, 11:14 by marcmees
very nice. thanks.
nice cave logic with a great GW ending.
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thanks, marc. the endsolve, maybe unsurprisingly, is my favorite part of this puzzle! it took a couple days to get right.
on 19. May 2022, 10:57 by KNT
Added link to example puzzle
