X-Ray Vision (Yin Yang X-Sums Sudoku)
(Published on 6. September 2022, 09:00 by Agent)
Here is another Yin Yang hybrid with a ruleset inspired by X-sums. But the puzzle has very little to do with arithmetic - its main theme is to explore a slightly unusual type of Yin Ying logic which I found interesting. You will see what I mean if you attempt it. I hope you will enjoy!
Rules
- Normal sudoku and Yin Yang rules apply.
- Clues outside the grid indicate the sum of X unshaded cells in that row or column, where X is the digit in the first unshaded cell from that direction. The row or column must contain exactly X unshaded cells.
Puzzle links
Have fun solving!
Solution code: Row 7 (from left to right) then column 1 (from top to bottom)
Comments
on 23. March 2024, 18:30 by Piatato
Lovely rule combo!
on 7. November 2023, 21:56 by madhupt
@Agent, what a fantastic puzzle, as usual from your vault. Very hard for me but a very satisfying solve.
on 3. July 2023, 13:10 by Snookerfan
Great puzzle! I'm glad to have looked for some older puzzles to solve, because this is a real gem that I would have missed otherwise. Thank you
on 10. October 2022, 10:52 by Vebby
Loved it! Wonderful unique logic.
-- Thank you @Vebby! I'm glad this one hit the mark for you.
on 1. October 2022, 04:04 by bansalsaab
great puzzle. it took me a long time to figure out yin yang but after that it was smooth.
-- Thank you @bansalsaab!
on 20. September 2022, 15:27 by cdwg2000
Very nice!
-- Thank you @cdwg2000!
on 9. September 2022, 22:15 by Christounet
Great puzzle with an original break in for a yin yang. Loved the restrictions that came from this combination. One has to be somewhat familiar with yin yang logic to attempt this, otherwise it might be quite harder to solve.
-- Thank you @Christounet! I agree with you that prior experience with Yin Yang helps a lot for this puzzle.
on 8. September 2022, 19:49 by MagnusJosefsson
Great puzzle, wonderful combination that works very well together!
-- Thank you @MagnusJosefsson, I'm glad you liked this combination of rules!
on 7. September 2022, 23:19 by Niverio
What a trippy puzzle! Loved thinking uniquely about YY like this!
-- Thank you @Niverio, I'm pleased to hear that this unusual Yin Yang logic was fun to think about!
on 7. September 2022, 22:13 by deltameth
@Al Fresco, thanks a lot for helping to locate my error! Then it went smoothly.
@Agent, this is a stunning puzzle, lots of fun! Thank you for setting.
Overall, it was not easy on the one hand but on the other there were no brutally hard logic bits per my view. Thus, I dare to suggest that difficulty might be closer to 4*. I know, it may sound very strange from me - a man that asked for a help to locate an error in his deductions :-0. But it's attributable to my stupidity, not the difficulty :) Maybe I'm wrong, just sharing my opinion..
-- Thank you @deltameth! I agree with you that no step is particularly difficult. I would probably rate it 4 stars as well, but I sort of knew that it would end up at 5 stars :p
on 7. September 2022, 21:17 by Al Fresco
Fantastic puzzle.
-- Thank you Al Fresco!
on 7. September 2022, 11:49 by DVFrank
Very nice! The first half was very beautiful but tricky for me and the resulting Sudoku was a nice reward! :^)
-- Thank you @DVFrank! Glad to hear that the sudoku went smoothly after the fairly challenging Yin Yang deductions, this is what I was looking for.
on 7. September 2022, 09:31 by marcmees
very nice. thanks.
-- Thank you @marcmees!
on 7. September 2022, 03:26 by ONeill
Excellent puzzle again. Enjoyed the new Yin Yang logic :)
-- Thank you @ONeill! Glad you enjoyed that type of logic.
on 6. September 2022, 15:26 by Dandelo
Very nice.
-- Thank you @Dandelo!
on 6. September 2022, 10:56 by polar
Another lovely (& quite different indeed) YY, with some surprisingly fun deductions along the way. Thanks :)
-- Thank you @polar! I'm glad you enjoyed the puzzle and that it surprised you a bit :)
