Congruity
(Eingestellt am 14. Dezember 2025, 03:06 Uhr von Andrewsarchus)
Rules:
- Latin Square:
- Place the digits 1-9 once each into every row and column.
- Index Lines (turqoise):
- The value in the Nth cell along an Index Line (starting from the diamond) indicates the position along the line where the value N appears.
- For example, if a diamond cell contains a 3, the third cell along that line must have a 1.
- Zipper Lines (lavender):
- Pairs of values equidistant from the center of a Zipper Line have the same sum.
- Where the center lies in a cell, the sum is the value in that cell.
- The sum may be different for different lines.
- Full Rank:
- A value in an external cell represents the rank of the number formed by reading the digits in that row or column from that direction, where (1) is the lowest such row or column and (36) is the highest.
- The 36 numbers are distinct - no ties.
Play Online:
sudokupad: Congruity
Lösungscode: The nine digit number corresponding to rank 35.
Kommentare
am 29. Juli 2026, 20:44 Uhr von kasperd
This one felt like a six stars difficulty.
am 28. Juli 2026, 19:19 Uhr von Azukay
This puzzle much like an onion and an ogre had so many incredible layers to pull apart. Truly an incredible journey, my first ever 5 star.
am 24. Juli 2026, 20:07 Uhr von 6rank
Very good and fun puzzle. The puzzle itself didn't feel very difficult but it is so incredibly complicated, which made it a very difficult puzzle nonetheless :)
am 21. Juli 2026, 00:50 Uhr von Fool on Hill
I had missed this till it turned up on CTC - and stopped to solve, and the plaudits are well deserved. Not brutal, but lots of thinking required.
am 3. Januar 2026, 05:52 Uhr von feverlute
Proud to solve this one. Hard to keep the logic straight, but very beautiful and satisfying
am 22. Dezember 2025, 21:35 Uhr von cyddrdrd
Learned a lot about FR in this puzzle. Thanks!
am 17. Dezember 2025, 20:12 Uhr von War
Aptly chosen puzzle name given the continuous circling on the outer blue line. A great and rewarding challenge indeed!
am 15. Dezember 2025, 16:10 Uhr von SenatorGronk
The sudoku equivalent of mud wrestling. Lots of inelegant flailing on this solvers part. Many times I thought I had a firm grasp, only to find things slip through my fingers.
Through determination and bullheadedness I eventually tamed the beast, but found myself exhausted at the end.
Well done, Andrew!
am 15. Dezember 2025, 15:33 Uhr von henrypijames
This FR index line has endless potential: Rotate it by just one cell (or any number thereof), it will behave very differently.
am 15. Dezember 2025, 14:49 Uhr von marcmees
Fantastic puzzle. Thanks
am 14. Dezember 2025, 20:12 Uhr von bansalsaab
That was a beast
am 14. Dezember 2025, 19:17 Uhr von Snookerfan
Incredibly clever, original and satisfying puzzle! Once you find the right way to appreciate the big index line, the puzzle unfolds nicely, still very hard. Thanks!
am 14. Dezember 2025, 17:23 Uhr von cryptique
Superb thank you
am 14. Dezember 2025, 06:12 Uhr von Justalilguy
Extremely enjoyable!
am 14. Dezember 2025, 03:37 Uhr von aqjhs
behold the holy grail of index lines!
