Unique Pairs (4x4)
(Published on 26. August 2025, 22:06 by randomra)
Place one of the digits 1-9 into every cell so that no digit is repeated in any row, column or box.
Unique Pairs: Every orthogonally adjacent pair of digits is a different pair. (e.g. if a 1 is next to a 3 no other 1 can be next to this 3 or any other 3)
Kropki: Cells separated by a black dot contain digits in a 1:2 ratio. Cells separated by a white dot contain consecutive digits. ALL (0) black and white Kropki dots are given.
Cages: Digits in a cage must sum to AT MOST 5. ALL (1) such cages (of at least size 2) are given.
SudokuPad Puzzle
Solution code: Row 1 (left to right) and row 2 (left to right), 8 digits
Comments
on 29. August 2025, 00:25 by Fisherman
I worked on this puzzle on a 9x9 empty grid. I used row 5 column 5 as workspace. Then used the four 4x4 corners as four monitors for the puzzle.
A very beautiful puzzle.
@Fisherman - Thank you! That is a great trick to use! :)
on 27. August 2025, 15:02 by giladooshlon
I found it quite hard and absolutely crucial to keep notes for this one. After figuring out all the necessary logic in a table (actually used Google sheets ^_^;), filling in the grid was pretty straight forward.
@giladooshlon - Yes, having some notes is quite useful for this one. Especially since there is not much space on the sudoku grid.
on 27. August 2025, 03:12 by cozmic72
Beautiful puzzle, lovely flow.
@cozmic72 - Thank you very much for solving it!
