Logic Masters Deutschland e.V.

Diamond Diadem

(Published on 1. May 2026, 17:41 by .proxz14)

About This Puzzle
This is the fifth edition of "Dazed Out", a puzzle series primarily built around the Sudoku variant "Chaos Construction". For this week I decided to re-visit a constraint I haven't used in a long time, the lockout lines. Having triple constraints on diamond cells led to some interesting ideas, I hope you enjoy.
RULES
  • 1. Chaos Construction: Divide the grid into 9 regions that each consist of 9 orthogonally connected cells. Place the digits 1-9 in every row, column and region once each.
  • 2. Diamonds: 2. A digit in a diamond indicates the number of cells that belong to its region in its row and column combined, counting itself once. Region borders block vision for this count.
  • 3. Also Diamonds: For a digit N in a diamond, there are a total of N diamonds on the grid that contain the same digit.
  • 4. Lockout Lines: Digits inside of the diamonds on both ends of a line must have a difference of at least 4, and the digits on the line itself must NOT be between them. Each lockout line must go through exactly 3 different regions.
  • 5. Kropki: Digits separated by a black dot have a ratio of 1:2.
Example Solution
▶ Play on SudokuPad

Solution code: Digits of the region that contain the given 3, in normal reading order. (Left-Right, Top-Down)

Last changed on on 1. May 2026, 21:26

Solved by sehringdipity, BeeBoi, tryote, marcmees, zeniko, irq, emoney1374, ShoneChello, 30somethingsolver, Becky, Survivalinstinct_07, dogfarts, haoju, Janie, Jesper, jkuo7, Asphodel, afineguy, Isael
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Comments

on 1. May 2026, 21:26 by .proxz14
specified "vision" for the second rule

Difficulty:4
Rating:96 %
Solved:19 times
Observed:3 times
ID:000SD9

Puzzle variant Variant combination Dissection puzzle

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