Scutula Letifera
(Published on 19. February 2024, 14:30 by Aleksandra Z)
Rules
Normal Sudoku rules apply; each row, column and box contains the digits 1–9, once each.
Digits separated by three necessary orthogonally-adjacent moves may not differ by three.
Comments
Orthogonally-adjacent means a cell which shares the edge directly left, right, up or down.
Necessary means that fewer moves must be insufficient. In particular, the four cells immediately adjacent are excluded despite being possible with three moves, because one move will suffice.
For example, the digit 4 prevents digits 1/7 from appearing within its three-move diamond. The digit 3 prevents only digit 6 from appearing.
The given grid has at least 800 million Sudoku solutions, but only one solution which satisfies the digit difference rule.
Puzzle
Solution code: Row 4
Comments
on 19. February 2024, 20:50 by Aleksandra Z
...which failed I presume due to length, thus has now another attempt to shorten it.
on 19. February 2024, 20:39 by Aleksandra Z
Oh—thank you! I had no idea how those were made; it has now a SudokuPad link also.
on 19. February 2024, 15:09 by kierownik
https://marktekfan.github.io/sudokupad-penpa-import/
on 19. February 2024, 14:34 by Aleksandra Z
Paragraph reordering
