Chess Lines
(Published on 10. February 2024, 18:09 by gdc)
This puzzle is inspired by Knight Line and similar puzzles. I decided to extend the concept to use all the chess pieces. Thanks to Skunkworks for testing and especially to Chameleon for creating a PuzzleTV version of this puzzle.
- Normal Sudoku rules apply.
- Adjacent digits on a line must form a valid chess move by the indicated piece on a 3x3 numpad.
- For example, a 1 on a knight line may only have the numbers 6 and 8 next to it so 6-1-8-1 would be valid.
- Pawns can only move exactly one cell up or one cell down, so 2-5-8-5 would be a valid pawn line.
Online Solving Links: Play on SudokuPad, Play on Puzzle TV, Play on SudokuMaker
Examples
Here are illustrations of the possible neighbors on a bishop (♗) and knight (♘) line. A 5 on a bishop (♗) line can connect to every other odd digit. 1 and 9 can also be next to each other on a bishop (♗) line since bishops (♗) can move multiple squares along a diagonal. A 2 on a bishop (♗) line can connect to 4 or 6. 5 can never be on a knight (♘) line and a knight (♘) always has exactly 2 possible neighbors on a line. A longer run for a knight (♘) line would be 1-8-3-4-9-2-7-6-1.
Solution code: Row 9 (9 digits)
Comments
on 3. June 2024, 14:17 by DonQuichopp
Wow! I understand why the discussion is about hardness of the puzzle. It took me - quite a beginner, this is my second 3-star solve - days to figure out even the breakin. I was quite quite quickly on the right track. But didnt manage to advance. After nights of thinking, I finally got to a solution only to find out I made a mistake waaaay back on one of the chess rules and had to start over. Hahahah
But then it went very smoothly. In the end the CtC Counter said 1262 minutes :-o
I would say after the breakin its a 2star, maybe even easier if the type of puzzle is known to the solver.
Thanks for the nice sudoku, I loved it, especially because I managed to finally solve it!
on 28. May 2024, 23:46 by Qodec
Magnificent!
on 14. February 2024, 19:53 by gdc
add example images
on 12. February 2024, 16:30 by ViKingPrime
Some surprising bits of logic in there I was not expecting to see. A few stubborn spots followed by a flurry of solving; if anyone hits a snag, stay persistent but maybe change your approach a little. Really fun! Glad to have managed to solve it.
on 11. February 2024, 16:53 by lmdemasi
Great puzzle. I disagree with those saying this is 3 - 4*. Felt like 1.5 - 2*. Nothing really tricky at all.
on 11. February 2024, 08:17 by gdc
increase difficulty from 2* to 3*. Thanks @Elliott810 and @galium_odoratum
on 11. February 2024, 07:53 by Elliott810
Absolutely brilliant puzzle! I would say 3-4 stars, too. Take a bow and thanks:)
on 10. February 2024, 22:12 by galium_odoratum
At least for me it wasn't a beginner friendly 1-star puzzle, based on my completion time it woud more like a 3-4 star puzzle. Anyway, I enjoyed solving it, thanks for setting!
