Touching Slitherlink with Blackout Tetrominos
(Published on 22. November 2022, 18:14 by KNT)
Blacken some cells in the grid such that all blackened cells form tetrominos, and no two tetromino shapes may repeat, including rotations or reflections. Tetrominos may not touch each other, even diagonally. If a cell with a clue is blackened, then that clue is ignored. Every tetromino must be placed outside the loop.
An example with trominos is provided:
Solution code: Row 3, If a cell is blackened, enter the letter corresponding to which tetromino the blackened cell belongs to (L, I, T, S, O), otherwise, enter the valid touching slitherlink clue for the cell.
Comments
on 29. June 2025, 04:44 by sfushidahardy
harder than it looked for me! cool puzzle
on 15. January 2024, 22:24 by Piatato
Fun!
on 25. November 2023, 08:04 by Christounet
Cool :)
on 20. March 2023, 22:03 by Lucx
I was almost going to write a comment, that it is not possible to solve it… but then I finally saw that it actually is possible to solve… very nicely done!
on 26. November 2022, 08:05 by wooferzfg
Beautiful logic, thank you!
on 22. November 2022, 20:15 by jovi_al
Lovely little puzzle! Nothing tricky, just a nice way to spend a small portion of your day :)
on 22. November 2022, 19:27 by Myxo
Nice! But it's harder than 2* in my opinion ;)
on 22. November 2022, 19:17 by KNT
Posted with a missing clue. Apologies!
on 22. November 2022, 18:19 by Niverio
Finally a cute KNT puzzle :)
