Killers in the dark
(Published on 20. September 2026, 19:01 by Artham)
- Fill the grid with digits from 1 to 9 so that no digit repeats in any row or column.
- The sum of the digits in a cage reads at the beginning of its first row. Digits cannot repeat inside a cage.
- If two digits are separated by a black dot, then one is double the other.
Solution code: Row 5 from left to right
Comments
today, 00:32 by yuripuppies
What a fun puzzle! It took me a hot minute for it to click but once it did it was smooth as butter. I also came from James Sinclair's newsletter ^^
yesterday, 22:51 by PancakePie
Beautiful work! Very fun to unravel. Thank you!!
yesterday, 18:38 by CSStead
Regarding the surge in solves: this puzzle was mentioned in James Sinclair's Artisanal Sudoku this week.
on 1. October 2026, 07:34 by Treme
10/10, right up my alley! Thank you
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Most welcome ! Glad you liked it.
Also may I ask how you were recommended that puzzle ? It seems to have had a big surge in solves very recently but I didn't see it featured anywhere.
on 30. September 2026, 00:15 by Nusch
Can someone please explain the rules? An example for the killer cage sum rule would be really helpful.
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Sure. Let's consider the top left cage for example. Let's say the digits in the cage are 1,2,3,4,5,7 and 9, summing to 31. Then the number 31 must appear at the beginning of the first row of the cage, which in this case is r1c1 and r1c2 ; so those two cells must be 3 and 1 respectively.
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Thank you, understood!
on 22. September 2026, 21:29 by ofsmul
Super fun, and easier than I expected. I ended up with a 2* time (22 mins), but also know that I have learned some tricks from puzzles of this style that saved me lots of time. Thanks for the puzzle!
on 21. September 2026, 18:17 by Myfyr MJ
Very nice but i found it hard - 55 minutes. I do however struggle with this type of killer sudoku so it might just be me.
on 21. September 2026, 18:13 by thomamas
Took me a minute to understand the instructions, but then the puzzle had real flow. Very fun. Wasn't quite as hard as I expected.
on 20. September 2026, 20:32 by YoBuggered
I thoroughly enjoyed this. Absolutely spectacular. It wasn't insanely difficult but it was sophisticated with ample working done.
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Wow, thank you ! I'm really glad you liked it. I had fun setting indeed.
