Rules:
Normal sudoku rules apply.
Digits along an arrow sum to the digit in that arrows circle.
Thermometers increase from the bulb end.
Links:
Hints:
Break-in Hint 1: Where does r3c8 (circle of the arrow) go in box 9? Ask the same question about the other circles.
Break-in Hint 2: What does it mean for r3c3 if all the other arrow circles are different digits?
Mid-solve Hint 1: What digit(s) can we put into r3c7 to give a valid arrow total?
Mid-solve Hint 2: Where does r2c8 go in box 1? Can r8c2 be the same as r2c8?
Mid-solve Hint 3: What digit(s) must appear on an arrow summing three distinct digits that cannot sum to 9? Where do those digits go on this arrow?
Late-solve Hint(s): Follow 5s counterclockwise around the grid. Check restricted columns and rows like r4 and c4.
Solution code: Row 2 followed by column 1 (left to right, 18 digits, no spaces)
on 20. February 2022, 10:13 by JR_pianoman
A wonderfully constructed puzzle. Lovely logic throughout
on 16. February 2022, 21:29 by pipedreambomb
Really nice. What a great series. It's more of a 2.5* I guess so I've rated it 3 to even the scales slightly.
on 15. February 2022, 17:03 by purpl
Solving hints added to align difficulty with 2 star rating! If you have a suggested hint or you feel a hint should be revised, please write a hidden comment.
on 13. February 2022, 00:20 by Nordy
Very nice! Indeed challenging for a 2-star puzzle, but that makes it perfect for anyone looking to expand their solving comfort zone
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purpl: Indeed it is definitely a 2.5 if that were a thing, I am happy it has been well received despite that! Thank you :D
on 12. February 2022, 22:42 by thespeak
This was the most challenging 2 star puzzle I’ve ever done. All of the logic was extremely fun to figure out, even though some of it really stretched my brain! It left me feeling like I’m stronger with my puzzle logic then I was a couple hours ago, and that’s what makes a truly great puzzle experience. Thanks!
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purpl: :,D what a wonderful comment, this absolutely made my day! Thank you.
on 12. February 2022, 21:00 by rhodri
Loved this! Thank you!
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purpl: Loved this comment! Thanks!
on 12. February 2022, 08:33 by brandon_bot
Beautiful break-in.
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purpl: Thank you :)
on 12. February 2022, 00:23 by DasBooch
Could not finish
on 11. February 2022, 08:48 by Bankey
Elegant discovery of Sudoku geometry ! Thanks, @ purpl :-)
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purpl: Hehe thank you! I don't know if it is a discovery so much as an idea that I spent hours trying to actually implement :P
on 11. February 2022, 04:04 by econtrout
Really enjoyed the symmetry...well set!
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purpl: Thank you for your lovely comment :D
on 11. February 2022, 00:06 by the_cogito
Lovely puzzle with an interesting break in and smooth flow :)
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purpl: Thank you! I appreciate your test solve when I was developing this puzzle.