Really? (Empty Grids Sudoku)
(Published on 8. November 2023, 12:00 by Crusader175)
Rules:
Normal 4x4 sudoku rules apply for each grid.
Digits may not appear in the same relative position in multiple 4x4 grids.
Grid 1 (Top Left): The finished grid contains the minimum number of friendly cells (6 cells), i.e. cell that contain digits which match at least one of the row, column, or box number. Friendly cells MAY NOT touch diagonally.
Grid 2 (Top Right): The finished grid contains the maximum number of friendly cells (12 cells).
Grid 3 (Bottom Left): For each number 1-4, there must be at least one set of three identical digits in a diagonal line of adjacent cells somewhere in the grid.
Grid 4 (Bottom Right): No additional rules.
Puzzle Link:
SudokuPad (with solution check)
My youtube channel on solving sudoku: Crusader Puzzle
Solution code: Row 4 from all grids (Grid 1-2-3-4)
Comments
on 24. January 2024, 14:47 by LeaVulpina
It took me a little while to wrap my head around max-ing/min-ing the number of friendly cells, but I've been wondering about 3D-oku for a while; this is SUCH a lovely implementation of it!
Reply: Thank you LeaVulpina!
on 6. January 2024, 12:16 by Fra314
Excellentastic.
Reply: Thank you very much!
on 13. November 2023, 16:53 by mathpesto
That was fun, thanks!
Reply: Thank you mathpesto!
on 9. November 2023, 10:25 by Kitty Trouble
A little hard to work my head around the friendly cell restriction. Nice puzzle overall. Rules could use a bit of clarifying whether the diagonal restriction only applies to box 1 or to all friendly cells.
Reply: Thanks for solving! I'm not sure. I only write that rules for grid 1, that should be clear enough no?
on 8. November 2023, 19:04 by Yann
Cute ! :-)
Reply: Thank you very much Yann! :)
on 8. November 2023, 16:12 by Kafkapharnaum
Not just simply a fun and creative puzzle, but also a perfect introduction to friendly cells -- highly recommended! :D
Reply: Thank you for the very kind comment! :)
on 8. November 2023, 13:17 by Myxo
Cute puzzle!
on 8. November 2023, 13:17 by Myxo
Cute puzzle!
Reply: Thank you for the solve myxo!
