Doubler Twin Deconstruction
(Published on 29. January 2025, 18:19 by Christounet)
Here is another twin puzzle. After using standard sudoku grids for this one, this one and this one, I decided it was time to combine it with another favorite of mine : deconstruction. As I expected with that ruleset, it took me quite a while to find a valid grid with a interesting solution path. The result is pretty challenging and intricate according to testers. Let me know what you think and have fun !
If you wish to solve with 2 separate grids to be able to use some conflict checker or other screen resolution, here are links with single grids that you may use.
Rules :
- Deconstruction : Fill each grid with 9 non-overlapping 3x3 square regions, such that each region contains the digits 1-9 once each and no digit repeats in any row or column. Cells outside regions do not contain digits. Their value is 0.
- No cell may contain the same digit in both grids. (Example : If R1C1 contains a 6 in the left grid, there can not be a 6 in R1C1 in the right grid)
- Doublers : Each 3x3 box contains a doubler, and each row/column contains a maximum of one doubler. The value of the cell is double the value of the digit. Each digit from 1-9 is doubled once in each grid. No two corresponding boxes can have the same doubler in both grids. (Example : if 6 is doubled in box 1 of the left grid, the doubled digit in box 1 of the right grid can not be 6). See an example grid below explaining the box numbering.
- Killer cages : Digits can not repeat in a cage. The values of the cells in a cage must sum to the total in the top left corner, if given. If the total is not given (or given as a minimum/maximum), it still has to be the same for the 2 cages that are in the same position in the 2 grids. A cage may sum to 0 if it contains no digit.
- Diamond : The values of the cells separated by a small white diamond are of opposite parity.
- Note : as both grids are identical, no anwser check is provided, because the solved grids could be switched.
Example puzzle :
Box numbers : Each green cell is contained within a different box with numbering left to right then top to bottom
Solution code: Digits in column 11 in both grids, from top to bottom, starting with the grid with the lower doubler in box 9.
Comments
on 8. February 2025, 03:16 by roflsalot
This is my favorite genre of puzzle (thanks for creating it), and this was just so beautifully constructed.
on 6. February 2025, 13:12 by Sotehr
What a masterpiece!
on 1. February 2025, 20:27 by sanabas
Very intricate, and a lot of fun.
on 1. February 2025, 15:53 by Agent
Brilliant and challenging, thanks!
on 31. January 2025, 15:50 by Jesper
Great puzzle, steady flow
on 30. January 2025, 12:23 by Myxo
Awesome puzzle! I found it surprisingly smooth, even though I usually struggle with Deconstructions.
on 30. January 2025, 09:30 by Christounet
Fixed a bug in the Penpa link.
on 30. January 2025, 09:16 by Piatato
Awesome! Very challenging throughout, and a lot of fun!
on 30. January 2025, 05:40 by gfoot
Very nicely put together, it is challenging throughout but there was always a logical path to find
on 29. January 2025, 23:44 by FischmitFahrrad
One of my all time favorite puzzles!
Stunning logic throughout the solve!
on 29. January 2025, 18:57 by Paquet Voleur
Exquisite setting with lots and lots of beautiful logic throughout, another very impressive feat by Christounet the Deconstuctor. Not an easy solve, and not a short one either, but a scenic tour of some of the best gems one can find in deconstruction and doubler sudoku, worth every minute of the long moment I spent on it. Note: the twin grids are quite sizeable, so a larger screen is preferable to a phone, and for most, probably not something to tackle on a long bus ride, unless you want to crank your resolution to a 6* difficulty. Thanks for having me testing this beauty Christounet!
on 29. January 2025, 18:26 by MaizeGator
Everybody needs to solve this one! Come prepared to use your secrets of deconstruction logic and make sure your arithmetic is on point.
In particular, I really liked the rules that digits could not be the same in both grids, or that doublers could not be the same in both boxes. At first it seemed like I would be prone to forgetting, but it felt very natural once I started solving.
