Oh Tannenbaum – Level 1
(Published on 24. December 2025, 00:00 by koarla)
Normal Sudoku Rules: Place the digits 1 to 4 so that each digit appears exactly once in every row, every column, and every 2×2 box.
Branches: Diagonally adjacent digits on the green branches must differ by at least 2.
Trunk: The digits on the brown trunk form a set of consecutive numbers (e.g., 1-2-3), but they may appear in any order (e.g., 2-3-1).
Baubles: Digits separated by a red Christmas bauble have a 1:2 ratio. One digit must be exactly double the other.
Play foggy version on SudokuPad
Play normal version on SudokuPad
All Levels
Solution code: digits of the right-most column from top to bottom
Comments
on 25. January 2026, 22:06 by koarla
added links to other levels
on 18. January 2026, 17:20 by stafen
Foggy version was really funny. Thanks
on 26. December 2025, 10:01 by koarla
added foggy version
on 26. December 2025, 09:25 by koarla
updated link without anti-king solution checking. thank you to everyone who pointed this out!
on 26. December 2025, 08:08 by SanFranSam
That was weird. Certain cells turned red as i solved. I thought that I had forgotten some rule. ;)
on 26. December 2025, 01:37 by michael_787
A leasurely 50 seconds...
on 25. December 2025, 09:56 by pjot
Enjoyable little puzzle, however something is wrong with the sudokupad rule - I had 4 red squares when I was done
