Bravais
(Published on 9. July 2025, 12:00 by rockratzero)
One of my puzzles in the Quads on Parade puzzle pack hosted by Bremster and the Sudoku Skunkworks. This pack is free to download, and I highly recommend checking it out!
Normal sudoku rules apply (fill each row, column, and 3x3 box with the digits 1-9 once each).
-Quadruples: Digits in a Quadruple circle must be placed at least once in the four cells touching that circle.
-Row Indexing: Digits placed in blue cells indicate the position of the digit equal to the row number in that column.
Click to play on SudokuPad
Exciting Announcement I am launching a variant sudoku puzzle book on Kickstarter 15 Aug. If you've been enjoying my puzzles, please consider supporting it! More Info Here
Solution code: Row 5
Comments
on 8. August 2025, 19:56 by rockratzero
Announcement
on 16. July 2025, 20:28 by firespire
I turned row/column labels on and had a fun time solving.
on 13. July 2025, 01:48 by Ganbatte
Whew! I got stuck on two puzzles in a row and this was my third. Fun to solve; thank you for the creative rule set!
on 11. July 2025, 05:29 by frosto
Nice puzzle but I had a hard time understanding the row indexing rule, as it's my first one.
Once done it was really easy.
on 10. July 2025, 19:03 by VitP
in crystallography, a BRAVAIS lattice is an infinite repeating structure, where the environment of every lattice point is the same.
this may not be possible on a sudoku grid (as well as the finite size)
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Indeed - I was inspired as such naming to imagine this grid as the unit cell for a larger lattice. :) -rrz
on 10. July 2025, 13:29 by Franjo
Yeah, easy - but what a beautiful and elegant setting! Thank you very much for creating and sharing a puzzle that will make beginners fall in love with variant sudoku.
on 9. July 2025, 18:53 by Mozart40
Like this, thx for sharing.
on 9. July 2025, 17:38 by marcmees
This proves that easier puzzles also can be nice. Cute pattern, both of Quads, as well as indexing cells. Thanks
on 9. July 2025, 15:10 by Fisherman
Extremely well crafted. Thanks.
