Latin Quarter
(Published on 14. February 2026, 07:20 by cygne)
Latin Quarter by Cygne
Play in SudokuPad
This puzzle has been in the works for an extremely long time, and I am thrilled to finally be able to release it. Hope you enjoy solving it as much as I enjoyed making it!
Rules
- Normal 9x9 Sudoku rules apply: Each row, column and 3x3 box contain the digits 1-9 once each.
- 8x8 Latin Squared Circles: Each row and column of circles contain the digits 1-8 once each.
- Anti-Knight Circles: Circles a chess knight's move apart cannot contain the same digit. (This does not apply to the Sudoku cells.)
- Quadruple Circles: A digit within a circle must be contained within the surrounding four Sudoku cells.
- Parity Lines: Digits along a red line, whether in a Circle or Sudoku cell, alternate between odds and evens. See the example below.
- Renban Lines: Digits along a pink line, whether in a Circle or Sudoku cell, comprise a non-repeating set of consecutive digits in any order. See the example below.
Line Behavior
Typically, Line constraints only interact with digits on Sudoku Cells, but in this puzzle they also interact with digits in Quad Circles.
In this example, the cell highlighted in blue is connected via a red parity line to a quad circle containing the digit 1. Because 1 is odd, and quad circles count as values along parity lines in this puzzle, the highlighted cell must be even.
Solution code: Sudoku Row 9 digits, left to right
Comments
on 21. February 2026, 14:28 by Tacocat
That's a beautiful idea and clever setting. I liked the interactions between the "two grids".
It took me 2h30, but I rate the difficulty at 4 stars : there was no overly complicated deduction, the difficulty was to know what to look for and scan the puzzle.
I understand the app's limitations required to make a 17x17 grid, but it would have been so much better to have regular big digits in the squares and actually seeing something when double clicking a digit. This is not a setting issue though, the puzzle itself is great !
With the current app, maybe that concept would work better on a smaller grid.
For those who feel intimidated, give it a try if you have a big screen and good eyes : you can make steady progress, and it's satisfying to solve.
Thank you for sharing your puzzle !
on 17. February 2026, 00:41 by itsid
what was that??
I sooo wanted to play this sudoku, the screenshot looked too tempting to let it pass..
So I opened the link and stared at it until my eyes ran dry and started to shrink inside their sockets...
I passed, I am NOT ready for this!
But I couldn't the mesmerizing image... I MUST
Ready or not...
I think the app counter rolled over or I forgot to unpause the game after my fourth or fifth cup of coffee.. IDK, but that thing is a beauty to solve.
Don't get me wroing, I found it terrible to scan this beast, I lost more track than the north pacific railway ever laid down but it was rewarding to claw my way through.
The way the 8x8 provided a shimmer of light in this tunnel of despair was just great.
luckily the endgame for my colouring attempt was pretty straight forward.
IDK if it was the hardest puzzle I ever solved, but it's certainly one that took the most effort AND more importantly one of the few that -being intimidated or not- I simply HAD TO solve even after shying away at first.
THANK YOU!!
on 15. February 2026, 14:03 by Snookerfan
Great puzzle! There was a lot going on, very interesting. Thanks
on 15. February 2026, 10:20 by Briks
Beautiful!
on 15. February 2026, 03:43 by BenClancy
Wow, absolutely loved this
on 14. February 2026, 14:46 by Exigus
Incredible puzzle, very impressive construction and it was a joy to solve. Thanks!
