Parasite Sudoku: Adults
(Published on 19. December 2025, 00:00 by NXTMaster)
This puzzle takes the Adult constraints found in Parasitic Destruction and Romantic Destruction and turns it into a standalone constraint. Hopefully this serves as an intro and practice before tackling the other puzzles. The other parasite sudoku can be found here: Parasite Sudoku: Larvae.
The rules are as follows:
The puzzle is available on SudokuPad and Penpa (answer check is on sudoku digits and parasites using the green line tool). Have fun solving!
The rules are as follows:
- Place the digits 1-9 once in every row, column, and region.
- Parasites: Draw parasites moving orthogonally through the grid that connect all circles that share the same digit. Parasites may not move diagonally, branch, or cross themselves nor each other, but they may touch themselves and each other otherwise. The start and end of each parasite must occur on distinct circles. Small white rectangles indicate cell borders crossed by a parasite or different parasites.
- All parasites in this puzzle are adults. Adults must contain a total number of bends between each circle (not counting bends on circles) equal to the digit in its circles. Additionally, all the digits an adult crosses are grouped by the regions they belong to, and the sum of all the digits in each group must be divisible by that adult's circle-digit.
The puzzle is available on SudokuPad and Penpa (answer check is on sudoku digits and parasites using the green line tool). Have fun solving!
Solution code: Column 1, Column 6 (Only cells occupied by parasites)
Last changed on -
Solved by PierreTombal, SPring, zeniko
Comments
Last changed on 21. January 2026, 19:36
on 21. January 2026, 14:22 by zeniko
These introduction puzzles are quite challenging on their own! Thanks for easing us in not just into the interesting ruleset, but also the difficulty levels to come…
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Thank you for embarking on this parasitic journey. These puzzles are mind-bogglers but hopefully as satisfying as they are difficult. Good luck with Romantic Destruction if you ever decide to continue the journey. My puzzle "Small Destruction" is the best intro to Destruction puzzles if you would like a quick example before Romantic Destruction.
