Flashlights - parity puzzle
(Published on 23. August 2026, 21:11 by Killer Joe)
Hello.
I really like the lighthouse ruleset, so I wanted to revisit Parity Lighthouse, but this time make sure there’s no ambiguity regarding the break-in. Although it is one of my lower-rated puzzles, Parity Lighthouse is still one of my personal favorites.
Normal sudoku rules apply.
A digit placed in a circle indicates how many digits of the same parity (odd or even) it sees in its row and column, including itself, where other parities block vision.
Digits separated by a white dot are consecutive.
Digits separated by a black dot means one digit is double the other.
Have fun.
I really like the lighthouse ruleset, so I wanted to revisit Parity Lighthouse, but this time make sure there’s no ambiguity regarding the break-in. Although it is one of my lower-rated puzzles, Parity Lighthouse is still one of my personal favorites.
Click image to play in SudokuPad
Normal sudoku rules apply.
A digit placed in a circle indicates how many digits of the same parity (odd or even) it sees in its row and column, including itself, where other parities block vision.
Digits separated by a white dot are consecutive.
Digits separated by a black dot means one digit is double the other.
Have fun.
Solution code: Row 9, first 6 digits.
Last changed on on 24. August 2026, 21:00
Solved by SKORP17, beansontoast_, Pioooooo, sealsinthesoup, claymategirl, amirs, Hierophis69, cmigas, jordanza, tuturitu, FriendlyChaos, olliwright, Franjo, trashghost, Karitsu, Ambrose, galium_odoratum, terrible_casserole, Bjd, Aaravos, at_ing, kangaroo, silver1, dr.Bunsen, Julianl, maearr
Comments
on 28. August 2026, 17:20 by dr.Bunsen
Very interesting puzzle. I like the ruleset - short and clear. However, at one point, I got stuck and, for lack of better ideas, decided to "branch" the solution process. I'm pretty sure I missed something. Thank you!
on 24. August 2026, 22:34 by Karitsu
Really nice! Thanks for setting!
on 24. August 2026, 21:00 by Killer Joe
Misclick. Nothing changed.
on 24. August 2026, 17:03 by FriendlyChaos
Really nice puzzle. Took me a bit to get going, but once it clicked it was a smooth solve.
