Knight's tree
(Published on 17. November 2025, 11:28 by ivaylagergova)
Normal Sudoku rules apply: Each row, column, and 3×3 box must contain the digits 1–9 exactly once.
Cells separated by a knight’s move in chess cannot have the same digit.
Difference Kropki dots (white): Cells joined by a white dot must have a difference of 1.
Ratio Kropki dots (black): Cells joined by a black dot must have a ratio of 2.
Renban lines (pink): Every Renban line contains a set of consecutive digits in any order, without repeats.
German whisper lines (green): Two cells connected by a German whisper line must have a difference of at least 5.
A V between two cells means the sum of the digits in those cells is 5.
Solution code: Column 1
Comments
on 6. February 2026, 17:48 by ivaylagergova
edited tags
on 17. December 2025, 23:37 by glum_hippo
Better to remove the 'XY-Differences' tag, which is not relevant here.
on 13. December 2025, 20:51 by Tws
It starts off moderately, but it gets tricky towards the end.
Great fun!
on 18. November 2025, 12:30 by Myfyr MJ
Very nice, 49 minutes for me. Just as well I am not colourblind! A rare 3 star solve for me when I struggle with some of the 2 star ones.
on 18. November 2025, 03:35 by 99%Sneaky
Challenging in the best way possible, some parts of the tree's bark where tough to peel away yet it was always rewarding to do so :D
on 17. November 2025, 18:39 by Snookerfan
Very nice! Some midsolve trickeries needed, but really smooth over all. Thank you
on 17. November 2025, 16:52 by ketchup_monster
Super approachable and fun puzzle.
on 17. November 2025, 14:49 by PinkNickels
Nice one! Deserves more solves. Some fun steps along the way.
