- There are cages in the grid. Numbers cannot repeat within cages.
- Black cages are normal killer cages. The digits in the cage must sum to the small clue in the top left corner of the cage.
- Red cages are psycho killer cages. Digits placed in the cage point to boxes in the grid, and provide a referred digit which is the digit in the same position in the box that is pointed to. The referred digits in the cage must sum to the small clue in the top left corner of the cage.
f-puzzles link - link to online solve tool.
f-puzzles link - link to version with shading that will be easier for colourblind people.
Rules Example
In this example the 4 in the PK cage points to the cell in box 4 in the same position, so it points to a 1. The 3 in the PK cage points to box 3, in the same position so it points to a 2. 2+1=3, so three is the total of the PK cage.
Solution code: Row 8 followed by Column 5
on 24. January 2023, 02:45 by dumediat
I really love the indexing logic that this constraint offers. Beautifully set, thank you for sharing!
on 21. October 2021, 02:12 by miraflores
Thank you for a lovely puzzle, I really enjoyed solving it. Hope to see more of this ruleset in the future.
on 8. October 2021, 15:46 by Gregocon
Thanks for the wonderful puzzle. Colour blind considerations really appreciated!
on 20. July 2021, 06:51 by cdwg2000
Very nice!
on 20. July 2021, 00:32 by Bremster
Added Rules Example
on 19. July 2021, 12:11 by Tom1i
I actually liked that one as well. Not as good as the later two - not even close, but still a fun little puzzle. Thank you for posting it. Will be sure to keep an eye for your puzzles in the future - love the logic in your setting. Tried advertising the #3 one a bit on the discord, but I'm afraid I may have bungled it. Someone asked me to explain the psycho killer cages, and I may have made a bit of a mess of the explanation. I am truly sorry, if that affects the number of solves you get or the rating the puzzle receives.
on 19. July 2021, 01:00 by Bremster
Psycho Killer 01 was a 6x6 proof of concept. My first ever puzzle (this was my second).
I didn't want to post it because it was a PoC more than a full puzzle. I should have restarted the numbering.
Link to Psycho Killer 01: https://f-puzzles.com/?id=yh8a7p3m
on 18. July 2021, 16:15 by Tom1i
Wow - just wow. Loved it. Thank you Bremster. Had to rate it hard (as I did with #3), since I struggled a bit - but never any doubt about a 100% rating!
#EDIT: Would love to try your #1 as well. Is it here on LMD?
on 12. July 2021, 22:11 by Rangsk
Great puzzle! Loved solving it on stream.
on 30. June 2021, 05:38 by Bremster
Rules clarification
on 29. June 2021, 16:52 by SKORP17
sehr schön
on 29. June 2021, 12:56 by Lakritze
Nice flowing puzzle! :)