4 bits Sudoku
(Published on 28. March 2020, 11:08 by stephane.bura)
This puzzle was inspired by the very elegant board game Quarto!
This is my first puzzle, so please comment if you have some advice for me.
Commenters asked for a tougher challenge so, if you haven't played this one yet and are game, you may want to try the harder version of this puzzle instead.
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General Rules: Place a digit from 1-9 into each cell of the grid so that every row, column and outlined 3x3 region contains each digit exactly once. Unique Cages: Each of the 16 two by two cages is a unique arrangement of odd and even digits (without taking their values into account, only their parities). This means, for instance, that there is only one copy of a cage containing only even numbers, and only one containing only even numbers in its left column and only odd numbers in its right column. Cages Sameness: A number between two cages indicates how many odd and even digits are in the same position in both cages (without taking their values into account, only their parities). Cage Sums: The number in the center of a cage is the sum of its digits. |
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Solution code: Row 8, followed by row 9.
Comments
on 3. October 2020, 20:11 by stephane.bura
Added link.
on 26. April 2020, 19:39 by sf2l
after solving this puzzle i show some worrying symptoms. NO,not covid19. Colourblindness
on 29. March 2020, 16:32 by Rollo
@CHalb: The name is 'Quarto!'. Look at the internet. I think we had already a game some years ago at a puzzle weekend and you won ;-).
on 29. March 2020, 15:05 by CHalb
@Rollo: What game do you mean? What's its name?
on 28. March 2020, 16:50 by Mesmer
It was a nice idea. I agree with that cdwg2000 said about the odd-even parity clues. I'm sure that having that in mind, you can create a more challenging puzzle. Have fun!
on 28. March 2020, 13:00 by stephane.bura
Thanks cdwg2000.
I'm new here and I was unsure whether the solution code was just to confirm that you had the correct solution or needed to require that you solve the full puzzle to obtain it. I'll make sure it's the latter in my future puzzles.
on 28. March 2020, 12:16 by stephane.bura
Thanks Puzzle_Maestro :)
I considered removing some of the sum clues to enforce using sameness, but it felt a bit less elegant. I'll definitely keep that in mind if I do another.
Thanks for the feedback!
on 28. March 2020, 11:55 by stephane.bura
Yes, digits may repeat within a cage.
on 28. March 2020, 11:42 by Puzzle_Maestro
Can digits repeat in cages?
on 28. March 2020, 11:34 by Rollo
:-) It looks very interesting! I own this game, but no one wants to play with me ;-(.
