Logic Masters Deutschland e.V.

Kin-Kon-Kan Sudoku

(Published on 18. July 2026, 19:45 by Gliperal)

Penpa SudokuPad

Fill the grid so that every row, column, and box contains the digits 1-7, one / mirror and one \ mirror. Each clue shines a beam of light into the grid that travels straight horizontally and vertically and reflects off of mirrors until it exits the grid at the edge. Clue values give the sum of digits along a beam's path. If a beam enters the same cell twice, the digit in that cell is counted twice. The ?s may be any digit except 0.

Example:

Links to play the example puzzle: Penpa SudokuPad

Solution code: Row 5, Column 4 (/ and \ for mirrors)


Solved by peterroder, Kreekers, glum_hippo, Playmaker6174, Mr.Menace, Myxo, blackjackfitz, SudokuHero, applesauce, Agent, marcmees, Piatato, wisty, Crusader175
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Comments

on 23. July 2026, 06:06 by Crusader175
What a crazy idea and beautiful construction!

on 22. July 2026, 22:40 by wisty
Really neat idea! I found the ending tricky.

on 22. July 2026, 21:54 by Piatato
Awesome! Surprisingly smooth and a lot of fun once you spot the way in!

on 22. July 2026, 20:14 by marcmees
amazing puzzle. Lots of fun to solve. Thanks

on 22. July 2026, 04:31 by Agent
Very distinctive puzzle, satisfying to solve!

on 22. July 2026, 00:19 by applesauce
Absolutely divine! Puzzle of the year territory for me. Inventive, beautiful, and fun!

on 21. July 2026, 14:44 by blackjackfitz
Huzzah!

on 20. July 2026, 20:11 by Myxo
Amazing!

Last changed on 20. July 2026, 20:17

on 20. July 2026, 20:06 by Mr.Menace
What a great puzzle. Thanks for making this! Scanning for mirrors needs some getting used to, but was worth it for sure!

Last changed on 20. July 2026, 13:38

on 20. July 2026, 13:38 by Playmaker6174
One of the very best constructions I've seen from both setting and solving perspectives. To achieve a solve this clean and precise under the rule set and the given theme must've taken forever xd

Last changed on 20. July 2026, 05:47

on 20. July 2026, 05:45 by glum_hippo
Breath-taking! What a wildly exciting idea, flawlessly executed.

Difficulty:4
Rating:100 %
Solved:14 times
Observed:1 times
ID:000SLF

Puzzle combination

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Solution code:

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