Planet X
(Published on 30. October 2025, 00:43 by mathpesto)
Rules:
Normal sudoku rules apply.
Anti-knight: Cells that are a knight's move apart (in chess) cannot contain the same digit.
Anti-diagonal: Each main diagonal contains exactly 3 unique digits.
Palindrome: The sequence of digits along the thick gray line reads the same in both directions.
Kropki: A white dot joins two consecutive digits and a black dot joins digits in a 1:2 ratio. Not all dots are not necessarily given.
Solve online:
Solution code: Row 1
Comments
on 17. November 2025, 21:37 by CarnacTheMagnificent
Great puzzle. Had some trouble with the disambiguation at the end but was able to figure it out. Thanks for the puzzle.
on 16. November 2025, 13:16 by Inge
Very nice puzzle!
Thank you
on 4. November 2025, 12:42 by fitzie
this wasn't too hard, except that I couldn't spot all the anti-knights, so it was very hard. either way it was a great solve, especially the disambiguation at the end.
on 31. October 2025, 18:38 by Mouser1299
Loved the disambiguation of the coloring at the end using the dots! Fun puzzle!
on 30. October 2025, 17:45 by akurski
Very nice colouring puzzle, definitely feels like the harder end of 2 stars/easier end of 3 stars to me
on 30. October 2025, 16:53 by Snookerfan
Very nice, thanks!
on 30. October 2025, 10:44 by brskri
Nice coloring and interactions.
on 30. October 2025, 07:16 by zhall12570
More of a 3 star than a 2 star to me. Very fun!
