On the Straightened Arrow
(Published on 6. February 2025, 19:50 by marty_sears)
- Normal sudoku rules apply.
- Yin Yang Yong: Colour the grid red, yellow and blue, so that all cells of the same colour are orthogonally connected, and no 2x2 area is fully one colour.
- A red cell's value = double its digit.
- A yellow cell's value = its digit.
- A blue cell's value = half its digit.
- Straightened little killers: Clues outside the grid give the total value of the indicated row or column.
- Equal value lines: A blue line joins two cells with the same value.
Rules:
Please leave a comment if you enjoy :)
Solution code: Row 6 from left to right
Comments
on 14. February 2025, 10:55 by DonQuichopp
I loved this puzzle, didn't know how to approach it for quite a long time. And then it clicked. After that the flow was wonderful, it always guided you to the next deduction in line.
Hopefully there'll be a CtC video of this. I'd love to see Simons' thought process on this. I needed an excel table, where I could play with double/single/half-digits and their sum. Doing this in my head alone, no way! My brain would probably melt ;-)
Thanks Marty for another great 6 hours of my life (and I mean that with all seriousness)
Marty: thankyou, and you're in luck! This was featured on CTC last Sunday :)
DonQuichopp: Oh, great, thanks! didn't search for it yet :-) looking forward to watching it.
on 14. February 2025, 02:05 by skuntsel
Extraordinary puzzle! Quite straightforward when you get a feel of it but otherwise not that easy to begin with. After solving it leaves a great feeling of accomplishment. Thanks Marty for setting it!
on 11. February 2025, 03:43 by greyhathero
Harder than 3 for me, but probably due to me not really doing 3 color yin yang before
on 10. February 2025, 15:35 by Vedvart
Almost felt like a fog of war puzzle (in a great way) with how piecemeal the logic was - there was always one single clear place to look, and the whole thing came together one step at a time quite nicely!
on 9. February 2025, 22:18 by mscha
Wonderful puzzle. Tricky arithmetic made my head hurt. ;-)
One of these puzzles that seem impossible, but there's always (exactly) one thing that brings you a step further.
on 8. February 2025, 20:42 by Gammon88
I really enjoyed this. Thank you so much
on 8. February 2025, 03:31 by Logerfo
Beautiful!
on 7. February 2025, 17:45 by Paquet Voleur
This was a brutal introduction to three-colour yin yang, for me who didn't even do that many yin yangs to begin with, but after investigating its dynamic, it became manageable and I definitely came out of it knowing and understanding more about YYY. Thank you for this beautiful puzzle!
on 7. February 2025, 16:59 by Joyofrandomness
Such a treat! Thanks for great puzzle
on 7. February 2025, 15:10 by mihel111
The elegance of the path is a japanese garden worthy. Brilliant.
on 7. February 2025, 14:09 by madhupt
Wonderful puzzle! Very smooth and enjoyable! Typical Marty. Thanks for making world a better place
on 7. February 2025, 12:14 by Franjo
Amazing and entertaining puzzle! Thank you very much for creating and sharing another beauty. (To the best of my knowledge the idea of Yin Yang Yo/ung goes back to at least 1998, when such a puzzle was made for the WPC.)
on 7. February 2025, 05:12 by rameshsrivats
What a brilliant puzzle! How do you even come up with such things? :)
on 7. February 2025, 01:35 by Big Tiger
Silverscree - I made one a while ago. Don't know whether Marty or I had the idea first but mine came out as "Yung" instead, ha ha.
https://logic-masters.de/Raetselportal/Raetsel/zeigen.php?id=000C8Q
Marty: yes I definitely didn't come up with the idea of 3-colour yin yang, definitely there were several examples before mine. But I do enjoy setting them, probably more than normal yin yangs
on 7. February 2025, 01:33 by Big Tiger
I finally solved a Marty Sears puzzle! And all on my own, ha ha!
on 7. February 2025, 00:46 by Myxo
Lots of fun, thanks!
on 6. February 2025, 22:51 by Silverscree
I've always loved three-colour yin yang (I also have always secretly added a yong to the rule in my mind) and this one doesn't disappoint. Thanks Marty :)
on 6. February 2025, 21:06 by Flinty
Bloody lovely.
