An entry in Fortnightly Topic Challenge #47: "Wacky Sudokus"

Other puzzles in this series

Welcome to the ninth puzzle in this series! For more information about the series, see the first puzzle and the introduction. Enjoy!

This might not technically count as a 'sudoku', but some of the rules are the same so I've included it.

             enter image description here

I guess the numbers don't get along well with themselves...

Google Sheets Link


  • Fill in every box so each box contains the digits from 1 to n, where n is the number of cells in the box
    • So a box with 4 cells, must contain the digits 1, 2, 3 and 4
  • The same digit cannot be orthogonally or diagonally adjacent.

I really like these and I don't know if they've been seen on the site before. I might make an extra large one (and perhaps even wackier!) if people like this!

  • 1
    $\begingroup$ How are you making these great puzzles so fast? $\endgroup$
    – Anonymous
    Commented Jan 18, 2021 at 17:28
  • 3
    $\begingroup$ @Anonymous I started making them a month in advance because I knew the FTC was coming :) $\endgroup$ Commented Jan 18, 2021 at 17:45

1 Answer 1


I used the exact same logic for each picture here:

Placing a number in a given region because there is only one spot for it to go; all other cells in that region are either already taken or are adjacent to other copies of that number.

With that in mind, some pictures, in order. I mostly completed two regions per picture.

Step 1:

step 1
I started with the obvious single-cell region and placed a 1. I got a lot of more 1s.

Step 2:

step 2
Now the top-right area.

Step 3:

step 3
Now some lower-right areas.

Step 4:

step 4
Finishing up the right side and some bottom area.

Step 5:

step 5
Now working on the left side.

Step 6 (and the solution):

step 6
With the top we're done!

Not hard but quite enjoyable.


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