3-box sudoku

For fans of Killer Sudoku, Samurai Sudoku and other variants

3-box sudoku

Postby ton » Wed Apr 01, 2026 2:33 pm

Code: Select all
+---+-------+
|...|... ...|
|.12|3.. ...|
|...|..3 4..|
+---+---+   |
|...|.5.|6..|
|...|.24|...|
|...|...|.6.|
|   +---+---+
|... ...|.2.|
|78. ...|.1.|
|47. ...|...|
+-------+---+


3-box sudoku 16clue list
https://xfs.jp/1ZI1dEwk
ton
 
Posts: 9
Joined: 26 October 2010

Postby 1to9only » Fri Apr 03, 2026 9:05 pm

The sudoku is rated 3.2.

For a GUI solver, use the 9x9 SE from https://github.com/1to9only/SudokuExplainer
Select Variants, Latin Square only (unselecting other variants, if any enabled)
Select Variants, Custom...

Enter this layout:
Code: Select all
AAA......AAA......AAA.........BBB......BBB......BBB.........CCC......CCC......CCC

Paste grid:
Code: Select all
..........123..........34......5.6......24..........6........2.78.....1.47.......

Image
User avatar
1to9only
 
Posts: 4212
Joined: 04 April 2018

Re: 3-box sudoku

Postby urhegyi » Sun Apr 05, 2026 1:57 pm

ton wrote:
Code: Select all
+---+-------+
|...|... ...|
|.12|3.. ...|
|...|..3 4..|
+---+---+   |
|...|.5.|6..|
|...|.24|...|
|...|...|.6.|
|   +---+---+
|... ...|.2.|
|78. ...|.1.|
|47. ...|...|
+-------+---+


3-box sudoku 16clue list
https://xfs.jp/1ZI1dEwk

download 3-box sudoku 16clue list here: https://github.com/Urhegyi/Sudoku-Uploads/raw/main/3box_16clue_list.zip
urhegyi
 
Posts: 765
Joined: 13 April 2020

Re: 3-box sudoku

Postby Hajime » Mon Apr 06, 2026 7:58 am

Interesting. 17 given clues is the minimum for a standard sudoku puzzle.
For a variant with more constraints like a sudokuX with diagonals, 12 givens will be possible for a valid puzzle.
This 3-box variant has 6 boxes less constraints, but 16 gives is sufficient.
Peculiar... :shock:
User avatar
Hajime
 
Posts: 1438
Joined: 20 April 2018
Location: Fryslân


Return to Sudoku variants