Canal View Japanese Sums
(Published on 28. May 2024, 09:00 by Agent)
Rules
- Shade some cells so that all shaded cells form one orthogonally connected area. No 2x2 region may be entirely shaded.
- Place some digits from 1 to 9 in every unshaded cell so that no repeating digits occur in any row or column. Shaded cells do not contain digits.
- Japanese Sums:
- Clues outside the grid indicate the sum of digits in each contiguous sequence of unshaded cells in the respective row or column, in the correct order.
- A "?" may represent any digit from 0 to 9, but for double digit numbers, the first digit may not be 0.
- A "..." represents any number of sequences of unshaded cells, including none at all.
- Canal View: Caged cells must contain a digit indicating the number of shaded cells connected in a straight line horizontally or vertically to that cell. All possible cages are given.
Puzzle links
Solution code: The digits in row 7 (from left to right) then column 10 (from top to bottom), ignoring shaded cells.
Comments
on 8. July 2024, 22:29 by ibag
Absolutely great!
on 1. June 2024, 15:57 by AnnaTh
Great fun, thank you!
on 29. May 2024, 17:08 by ONeill
Fun combination and well executed :)
on 29. May 2024, 10:44 by Piatato
Lovely puzzle!
on 28. May 2024, 23:17 by Jesper
Great puzzle, lots of fun!
on 28. May 2024, 22:54 by Playmaker6174
For a minute, I was wondering what everyone meant by "negative constraint utilization" in here after that funny opening, but then it didn't take long later on to see that I was totally bombarded by the usages of the negative constraint.
A very neat and lovely setting there :)
on 28. May 2024, 13:40 by Christounet
Great puzzle, awesome geometry, and indeed an incredible amount of "negative constraint" related deductions. Thanks :)
on 28. May 2024, 12:11 by Niverio
You should rename this puzzle to "How to abuse a negative constraint as much as possible". Beautiful puzzle!
on 28. May 2024, 12:10 by MagnusJosefsson
Fantastic puzzle! Impressive how you were able to make the negative restriction do so much work in resolving the grid.
