Rules:
Normal Sudoku rules apply.
Fog of War: The grid is covered mostly in darkness. Placing correct digits in cells will illuminate more of the grid.
Cave: Cells are either wall or cave cells. Walls are orthogonally connected to the edge of the grid and the cave is one orthogonally connected area. A 2x2 area cannot be fully wall nor fully cave. White circles are cave cells and the value in a circle is the number of cave cells seen in that row and column, including the cell itself. Walls obstruct vision.
Killer: A cage contains no repeated digits, and the values of the cave cells sum to the given total. Wall cells don’t count towards the sum. (Note: A cage’s clue doesn't necessarily appear in the uppermost nor leftmost cell.)
Doubler: A doubler appears exactly once in each row, column, and 3x3 box. For purposes of circles and cage sums, such cells’ digits are doubled in value. Each digit is doubled once.
Solve:
Lösungscode: Digits in row 1 (left to right) then column 4 (top to bottom) (18 digits, no spaces)
am 22. Dezember 2023, 23:39 Uhr von StephenR
Definitely one of the best fog of wars I've done, a delight from start to finish. Even when FOWs are difficult, you always know where you have to look. I don't know if that's an interesting challenge to setters or a limitation of the genre.
am 24. August 2023, 13:22 Uhr von vfig
tough but really enjoyable! lmd tells me i apparently solved this back in december last year; i must have completely forgotten. but never mind, i just enjoyed solving it all over again! :)
am 15. Mai 2023, 16:27 Uhr von kmoter
Truly a journey through foggy cave, thanks
am 30. Januar 2023, 19:59 Uhr von Vebby
Magnificent construction!
am 28. Dezember 2022, 00:49 Uhr von AnalyticalNinja
Well that was definitely the trickiest FoW puzzle I've solved. Very cool puzzle though, I enjoyed that immensely.
am 25. Dezember 2022, 07:34 Uhr von TJReds
Officially my first 4 star completed, and gosh was it a beautiful puzzle! (Only took 3.5 hours but wholly worth it!)
am 23. Dezember 2022, 01:05 Uhr von poundcayx
Simon is right in saying this is the best fog of war puzzle made so far. beautiful!
am 22. Dezember 2022, 23:32 Uhr von chalk235
Wonderful puzzle - a work of art!
am 21. Dezember 2022, 15:59 Uhr von ddx2407
Really beautiful puzzle. Highly recommend this one.
am 19. Dezember 2022, 21:32 Uhr von Christounet
Really nice puzzle ! The combination of all the rules worked magically. Thanks.
am 19. Dezember 2022, 14:26 Uhr von Chilly
Very nice - my first cave puzzle too. Enjoyed it a lot :)
am 19. Dezember 2022, 14:04 Uhr von Fool on Hill
Nice interaction of mixed logic - quite a challenge to solve: so easy to make a wrong assumption.
am 19. Dezember 2022, 07:34 Uhr von henrypijames
The comparatively low rating is entirely unfair to this great puzzle.
am 18. Dezember 2022, 14:30 Uhr von Snookerfan
Very good! Thank you
am 18. Dezember 2022, 08:58 Uhr von erml
This is brilliant, thank you!
am 18. Dezember 2022, 02:11 Uhr von cdwg2000
Very nice!
am 18. Dezember 2022, 01:23 Uhr von Ofri
Incredible puzlle! Nice inventive logic, was a real treat. Thank you!
am 18. Dezember 2022, 00:51 Uhr von wisty
This was one of the first cave puzzles I've solved and it took me awhile due to getting used to the scanning for it but I really enjoyed it and found it quite approachable! Thank you so much for sharing :)
am 17. Dezember 2022, 23:32 Uhr von MagnusJosefsson
Great puzzle, I enjoyed it a lot!
am 17. Dezember 2022, 18:52 Uhr von Bellsita
My first cave puzzle!! I loved it!