Domino Reduction
(Published on 30. July 2024, 19:09 by Calesch)
Rules:
Normal sudoku rules apply: place the digits 1-9 once each in every row, column, and box.
Divide all cells that are not shaded gray into 1x2 dominoes, which do not occupy gray cells or overlap.
Make each domino red, blue, or yellow so that:
- Yellow dominoes contain consecutive digits
- Blue dominoes contain digits in a 1:2 ratio
- Red dominoes contain digits that sum to 10
(if you prefer, any other combination of 3 colors also works)
Dominoes of the same color cannot touch orthogonally.
The digit in a cell with an arrow indicates how many dominoes have at least one cell that appears in the given direction.
Solution code: Row 3, with hyphens (-) between cells of different colors
(gray cells are a different color from domino cells)
Comments
on 22. January 2025, 08:06 by mellowrobinson
Every time you think you're stuck there's a little tidbit to keep you going. Awesome
on 19. August 2024, 22:10 by wuc
Awesome puzzle. Very hard took me 90 minutes. Twice I almost gave up. But very rewarding to find the cool small steps to continue. Great fun thx.
on 5. August 2024, 23:07 by StephenR
Excellent puzzle, thanks. Very interesting ruleset which I have not seen before, and satisfyingly tricky in parts.
on 31. July 2024, 15:14 by marcmees
very nice. thanks
on 31. July 2024, 08:51 by Bankey
Fun puzzle. Thanks, @ Calesch :).
on 30. July 2024, 21:24 by bansalsaab
Loved it. Amazing interaction between dominos
