Normal sudoku rules apply.
Digits can not be separaded by a knight's move (in chess) from the same digit.
Cells connected by an X must sum to 10.
Cells connected by an V must sum to 5.
Digits in a cage sum to the number in the top-left corner.
Digits on a arrow sum to the digit in the arrows circle.
Digits on thermos must increase from the bulb.
Any constraint type can not have a repeated digit in the puzzle. (if a cage contained a 1, no other cage can contain a 1.)
--------------------------------
Feel free to recommend this puzzle to anyone.
Feel free to take special rules for your own puzzle.
Feel free to give feedback.
Bless you!
---------------------------------
Solution code: give the digits of column 3 (top to bottom)
on 10. February 2026, 17:22 by illandres
Tricked myself up a couple of times because I was using colors and letters to track different constraints and neglected to acknowledge that the color and letter could be the same thing. It was a lot to keep in my mind at once, but that created a really pleasant challenge that, while tough, wasn't insurmountable! Thanks so much for setting!
on 5. February 2026, 23:39 by War
Never used the top left arrow, otherwise excellent ruleset and puzzle
on 3. February 2026, 06:14 by virus_dave
I found this break in quite challenging, and had to restart a couple of times, until I noticed I had overlooked a rule. Then it was challenging still, but at least doable ????
Lovely puzzle, thank you!
on 2. February 2026, 19:21 by superkinkel
Wow, this was rather a 4 star for me. I had to start over twice ...
... but very nice!
on 2. February 2026, 09:43 by AnebodaSlatorp
Lovely thanks
on 31. January 2026, 17:37 by GeorgeTheToad2
Hard but fair. Took a while to break in and then flowed very quickly. A low 4* difficulty for me.
on 31. January 2026, 14:36 by Onkel_Dagobert
Brutal for me. 104 min. But very satisfying in the end. Thank you for sharing!
on 31. January 2026, 13:31 by Onkel_Dagobert
Brutal for me. 104 min. But very satisfying in the end. Thank you for sharing!
on 31. January 2026, 10:10 by Snookerfan
Very nice! Clever break-in and smooth afterwards. Thanks
on 31. January 2026, 01:50 by bigbrooklyn
Awesome puzzle with a very rewarding solve
on 30. January 2026, 23:22 by Exigus
Excellent setting. Thanks!
on 30. January 2026, 20:22 by PinkNickels
You've generously shared a lot of great puzzles with us...this is one of the best. Absolutely stupendous. Bravo!
Please note: The German version of this page has changed. It is possible that this page does not contain the latest information.