Red + Blue = Purple
(Eingestellt am 21. Juli 2025, 17:54 Uhr von Kaktuslav)
Rules: Normal Sudoku rules apply. Yin-Yang: Color each cell in the grid either red or blue, such that no 2×2 square is monochromatic and the cells of each color form a single orthogonally connected region. Lines:
- Every line that passes through at least one red cell is an alternating-parity line (i.e. each pair of consecutive digits along the line must include one even and one odd digit).
- Every line that passes through at least one blue cell is a region-sum line (i.e. box borders divide the line into segments with equal sums; these sums may vary between lines).
- Any line that passes through both red and blue cells is also a renban (i.e. it contains a set of consecutive, non-repeating digits in any order).
If you enjoyed this puzzle, you might like a different (and slightly more difficult) take on `lines of unknown nature' here :)
Lösungscode: All the blue digits in row 5 (left to right) followed by all the red digits in column 5 (top to bottom)
Kommentare
am 5. September 2025, 22:33 Uhr von zeneszerzo
When I traveled home from London to Budapest I downloaded some sudokus to solve on the airplane to kill time. I was so angry, that this took me almost 90 minutes, because I remembered that it's a 2 star. Now, that I can see it's a 4 star I'm actually quite happy with myself. Wonderful puzzle!
am 13. August 2025, 00:40 Uhr von damasosos92
Brilliant puzzle!
am 11. August 2025, 15:24 Uhr von Wonderment
I took this on right after finishing your brilliant and original "Roots in the Fog" puzzle and I enjoyed it even more. The rules may be a bit intricate, but the construction is fantastic, and it ended up solving much more smoothly than I expected when I first started.
am 9. August 2025, 21:59 Uhr von Hay-in-needlestack
This puzzle is impossible. Maybe I can make a small deduction here or there... <An hour later> Wow! That was amazing, thanks for setting!
am 27. Juli 2025, 12:47 Uhr von polcat
Incredible puzzle - loved it. Thanks!
am 26. Juli 2025, 15:04 Uhr von oskode
Really smooth solve with fun logic all the way through, thank you!
am 26. Juli 2025, 00:06 Uhr von Allagem
Some very original logic in this one, with an ending that played out quite differently than what I was expecting. Enjoyed it a lot!
am 22. Juli 2025, 13:15 Uhr von 9Rookienumbers
Brilliant take on YY, thanks!
am 22. Juli 2025, 01:26 Uhr von zeniko
Parities are red
Region-sum blue
Renban are both
Thanks to you!
am 21. Juli 2025, 20:13 Uhr von thoughtbyte
Excellent puzzle, lots of fresh, interesting logic packed in a nice, smooth flow. Well done, thanks!
