Anti-Knight Thermos 3
(Published on 7. October 2025, 05:57 by Jeet Sampat)
Molecules
This is the grand finale of my anti-knight thermos trilogy. You can try the other two puzzles here: Anti-Knight Thermos 1 | Anti-Knight Thermos 2.
I checked with Rangsk's solver and noticed that there are ~15 x 10^15 solutions to the puzzle without the anti-knight constraint, so buckle up!
Rules:
Normal Sudoku rules apply.
Any two cells separated by a single move of a Chess knight must contain different digits.
On grey thermometers, digits must strictly increase from the circular bulb-end.
Try it on Sudokupad.
Puzzle:
Solution code: Column 1 (top to bottom); 9 digits and no spaces.
Comments
today, 13:44 by Ramez
This is a very beautiful series indeed! I couldn't resist solving all 3 puzzles back to back. I hope this series doesn't end here and you come up with a sequel. This last puzzle seems impossible at first glance until one starts asking some interesting questions. Thank you for setting and sharing these beautiful puzzles.
yesterday, 07:56 by Norkas
The puzzle manages to feel very unique with a ruleset/concept that, while still fun, feels a bit saturated to me at this point. Really nice setting.
on 8. October 2025, 09:24 by Snookerfan
Brilliant puzzle! Very tricky, there is always a clever question to ask that brings you forward, but it's never obvious which question that is. Very rewarding solve. Thank you
on 7. October 2025, 20:32 by Starlight
Really enjoyed this and it really tested me. Had to take a break inbetween. Every time I thought it was going to be smooth sailing there was another challenge. I got there in the end though.
on 7. October 2025, 11:23 by Gambit
Very tricky...proper 4* puzzle. Thanks for sharing.
on 7. October 2025, 08:06 by alexsmart
Every step of the solve felt extremely deliberate. There were at least two times I was only able to spot the next deduction by thinking "I bet he has managed to pull the same trick one more time".
Genius setting!
