Staurolite (Psycho Look-and-Say/XVXV) collab with bellsita
(Published on 31. January 2023, 13:35 by dumediat)
This is a puzzle that bellsita and I created using Psycho Look-and-Say cages. This new constraint is a conflation of Psycho Killer (pioneered by BremSter) and Look-and-Say (pioneered by Derektionary) rules. This puzzle also uses the XVXV constraint pioneered by henrypijames. We hope that you enjoy!
Ratings, comments, and feedback are much appreciated! Please feel free to reach out to me on Discord if you have any comments or questions. Please also feel free to try my other puzzles here.
Rules:
- Normal sudoku rules apply.
- XVXV: Cells connected by a V must sum to either 5 or 15. Cells connected by an X must sum to either 10 or 15. Not all possible Vs and Xs are given.
- Pink cages are psycho look-and-say cages. In these cages, the digits in the cage point to boxes in the grid, and provide a referred cell which is in the same position in both boxes. The number in the top left corner should be read as a look-and-say number, which says the number of times a digit appears in the cells referenced by that cage (eg, a "23" clue means there are two 3s in the referenced cells). Digits placed within cages do not count towards the look-and-say total unless they are self-referencing, and digits may not repeat in cages.
For example, if r1c5 were a 1 and r2c5 were a 3, then exactly one of the referenced cells in box 1 or box 3 (r1c2 or r2c8, respectively) would need to contain a 2 to satisfy the look-and-say clue of "12" (ie, one 2 in the referred cells). The following image may help to visualize this example:
F-puzzles: https://f-puzzles.com/?id=2p4qkfaz
SudokuPad: https://tinyurl.com/3725y6v4
Solution code: Column 6 (9 digits)
Comments
on 10. April 2024, 13:49 by The Book Wyrm
Fun puzzle! Nice and easy, but a lot of neat interactions between the constraints.
on 13. March 2023, 01:32 by Agent
Very clean and elegant puzzle!
>>dumediat: Thank you very much!
on 11. February 2023, 01:21 by nomos
Can you elaborate on the way the digits in the pink cage refer to a cell? I can't see a pattern in the examples given for referenced cells:
- 1 in r1c5 = r1c2
- 3 in r2c5 = r2c8
- 4 in r1c5 = r4c2
- 5 in r2c5 = r5c5
>>dumediat: Sure! Think of the boxes in the grid as boxes 1 to 9 reading left-to-right, top-to-bottom; similarly, think of the cells within each 3x3 box as being in positions 1 to 9 following the same pattern. So, r1c1 would be in position 1 in box 1, r1c2 would be position 2 in box 1, r9c9 would be position 9 in box 9, etc. In the example, the blue 1 in r1c5 is in position 2 in its box; since r1c5 contains a 1, it refers to the same position (position 2) in box 1, and looks for the digit in that cell (r1c2). Looking at the green cell in r2c5, that is in position 5 in the box; since r2c5 contains a 3, it looks for the digit in position 5 in box 3 (ie, r2c8). Hopefully that helps!
on 8. February 2023, 23:48 by Piatato
Really excellent combination of easy, inventive and great fun to solve :)
on 8. February 2023, 11:25 by dodomos
I regret that I skipped this puzzle before. Very good puzzle!
on 5. February 2023, 03:39 by djorr
just wonderful!
on 2. February 2023, 21:37 by Niverio
Lovely idea and surprisingly smooth flow!
on 2. February 2023, 20:01 by Chilly
Love the rule set - nice approachable intro to it.
on 2. February 2023, 05:36 by mathpesto
What a great combination of rules! Took a minute to wrap my head around them, have never done psycho killer rules before, but fascinating logic :)
on 2. February 2023, 00:22 by karlmortenlunna
Lovely puzzle!
>>dumediat: Thank you very much!
on 31. January 2023, 23:15 by riffclown
Beautifully Done!
on 31. January 2023, 21:13 by randall
I loved this puzzle! Such an interesting constraint, and beautiful implementation. Great setting, both.
on 31. January 2023, 20:58 by RockDoc
Interesting rule set, hadn't seen it before. Was enjoyable.
>>dumediat: Thank you, glad you thought so!
on 31. January 2023, 14:24 by Steven R
Fun puzzle, thanks!
>>dumediat: You're welcome, glad you had fun!
on 31. January 2023, 14:14 by CahounCZ
Nice puzzle!
>dumediat: Thank you!
