One Line Miracle
(Published on 9. March 2026, 13:47 by Rab3aron)
One Line Miracle
Rules:
Normal 4×4 Sudoku rules apply. Orthogonally adjacent cells cannot sum to 5. The four 3×3 window sums increase in reading order.
Happy solving!
Solution code: Row 1.
Comments
on 11. March 2026, 18:13 by Anthony
I didn't understand what the 3x3 window sums meant at first, but reading other comments helped me figure it out. After that it became pretty easy, although I think I'd say figuring out the trick is probably 2 stars difficulty.
on 10. March 2026, 18:48 by SanFranSam
I understood what the 3x3 boxes were. I knew what i needed to achieve in terms of the cells that needed to add up right to make the increasing order work. but it took some trial and error to get there. Took about 15 minutes. But then there are some 1* i can't solve.
on 10. March 2026, 12:10 by Rab3aron
Clarification:
The sum of the 3x3 box that starts at r1c1 < the sum of the 3x3 box that starts at r1c2 < the sum of the 3x3 box that starts at r2c1 < the sum of the 3x3 box that starts at r2c2
on 10. March 2026, 11:35 by AlSina
I believe this part of the rule, “The four 3×3 window sums increase in reading order,” needs clarification. The sum of 1, 2, 3 and 4 in any other arrangement is always 10. It’s confusing how we can differentiate these sums.
on 10. March 2026, 07:26 by JVA
You should probably clarify in the rules what the 3x3 windows are
on 9. March 2026, 23:35 by Rab3aron
It means that The first 3x3 box (starts at r1c1) has the smallest sum, then the second 3x3 box (starts at r1c2) has the second smallest sum, and so on..
on 9. March 2026, 21:29 by Plok
I don't understand this rule:
"The four 3×3 window sums increase in reading order". Can you give an example. What sum? Reading order in the box or over the boxes?
on 9. March 2026, 20:12 by frollark
Good one!
on 9. March 2026, 15:11 by Vionix
Very fun snack
on 9. March 2026, 14:07 by sfield
Took a little time to figure out the trick. Then obviously it went fast because it's so small. But the trick was very satisfying to find and a really nice little mathematical idea.
