Logic Masters Deutschland e.V.

Activated Japanese Sums

(Published on 12. November 2022, 13:36 by RockyRoer)

This is the second puzzle in a series of puzzles featuring a new rule - Activated Cells. If you enjoyed this, please consider trying:

The Rules

  1. Normal sudoku rules apply.
  2. [Activated Cell] An activated cell is the xth cell in from the outside of every row and column from both directions, where x is the first cell seen in the row or column from that direction.
    • In the row 314592876 the 4 is activated by the 3 and the 5 is activated by the 6.
    • In the row 239417568, only the 3 is activated.

    • Notice the first picture is the two rows described above, the second is a possible complete grid, with the active cells shaded from all four directions.
    • Hint: I recommend shading cells that must be inactive one color, cells that must be activated a different color temporarily and cells you've determined ARE activated a different color.
  3. [Japanese Sums] Numbers on the outside of the grid are the sums of contiguous regions of active cells in a row or column, in order. Multiple regions must be separated by an inactive cell. The ? ? represent two different regions, whose sums are not given.

The Puzzle: Try it on CTC-App

Solution code: Row 4 and column 8

Last changed on on 14. November 2022, 03:10

Solved by Jesper, chameleon, glum_hippo, SenatorGronk, polar, henrypijames, majestic spork, Nylimb, PixelPlucker, h5663454, ICHTUES, mnasti2, Vebby
Full list

Comments

on 5. February 2023, 22:03 by ICHTUES
One of the hardest and most beautiful puzzles I've solved!

on 5. February 2023, 15:40 by h5663454
Great puzzles! Its entire reasoning process is completely linear, and in the use of related inferences, it is more friendly than the previous puzzle.

on 20. November 2022, 19:14 by Nylimb
That was very hard to solve, and amazingly well constructed. Thanks.

on 14. November 2022, 15:27 by SenatorGronk
Keep 'em coming. This is a fun ruleset.

on 14. November 2022, 04:54 by glum_hippo
An utter delight, but quite devious too! Thank you, RR

on 14. November 2022, 03:10 by RockyRoer
Edited difficulty - adjusted up to 4/5 stars from 3.

on 12. November 2022, 16:17 by Jesper
Very nice, thanks!

Difficulty:5
Rating:94 %
Solved:13 times
Observed:3 times
ID:000BZ4

Enter solution

Solution code:

Login