4D Killer Sudoku
(Published on 11. October 2021, 22:29 by FryTheGuy)
This is probably the final 4D puzzle, following 4D Arrow Sudoku and 4D Thermo Sudoku
This puzzle links two different sudoku grids so that if a cell is >=6 in one grid, it will also be >=6 in the other grid.
For example, if R2C4 was a 7 in the first grid, we would know R2C4 must be a 6,7,8 or 9 in the other grid. If R5C8 in the second grid was a 5, we would know R5C8 in the first grid must be a 1,2,3,4 or 5.
Basically, it is a high/low coloring puzzle where when you deduce the color in one grid, you can also color the other grid in the same location.
RulesNormal sudoku rules apply.
In cages, digits cannot repeat and must sum to the small clue given in the top left corner.
If a cell contains a number >=6 in one grid, the corresponding cell in the other grid must also contain a number >= 6.
Solve the puzzle at penpa.
Solution code: row 8 of grid 1, row 8 of grid 2
Comments
on 27. July 2025, 15:20 by Playmaker6174
Also since the original link no longer works, here's a new solving penpa link I made (with no solution check): https://tinyurl.com/28yx4ypw
on 27. July 2025, 15:17 by Playmaker6174
Been a long while since I got to see this one when it came out, but now I finally finished it and got humbled by you once again.
One of the best killer puzzles I've ever solved for a long while, no doubt.
on 15. January 2025, 10:03 by Las4one
Grid 1 (Left): https://sudokupad.app/2yuz1ljd33
Grid 2 (Right): https://sudokupad.app/dcbk5kgdfw
on 10. May 2024, 07:12 by Agent
Excellent!
on 10. September 2022, 00:06 by Niverio
Mind blowing
on 10. September 2022, 00:05 by KNT
Incredible!
on 24. August 2022, 05:26 by polar
The logic & break in on this one was just sublime. Thanks :)
on 12. May 2022, 03:11 by Vebby
Awesome trilogy! Each one as good as the last! Thanks Evan :)
on 16. October 2021, 14:35 by cdwg2000
Very nice!
on 12. October 2021, 21:08 by ___
6/5 difficulty for me. i was sweating. thanks again FryTheGuy!
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Happy you found your way through it!
on 12. October 2021, 03:34 by OhHeyGuysItsMax
Very clever and very hard puzzle. Well done
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Glad you liked it, thanks!
on 11. October 2021, 22:37 by Piatato
My favourite 4D puzzle so far!
