Logic Masters Deutschland e.V.

Sand-sandwich-wiches

(Published on 14. August 2026, 14:08 by RockyRoer)

The only thing better than sandwiches is sandwiches inside of sandwiches, am I right?!

The Rules:

  1. [Modified Sudoku]: Fill the grid with the numbers 1-7 and the letters R and C, such that every row, column, and box contains one each.
    • In every row, the letter R may not be between the 1 and 7.
    • In every column, the letter C may not be between the 1 and 7.
  2. [Sandwich] Clues outside the grid represent the sum of the values of the cells sandwiched between the 1 and 7 in that row or column.
    • Cells containing R have a value equal to that Row's sandwich total.
    • Cells containing C have a value equal to that Column's sandwich total.
  3. [Ambiguous Kropki]: Cells separated by a dot have a difference of values equal to 1 or a ratio of values equal to 2:1.

The Puzzle:

Try the puzzle using Sven's Sudokupad

For mobile users, try this version which uses the letters A for across and D for down.

Solution code: The values of the cells in column 9 from top to bottom [9-11 digits]


Solved by vollbesonderbar, erml, ShuffBeeeell, kublai, bansalsaab, emoney1374, tuturitu, marcmees, Franjo, zeniko, Gunkan, amirs, chiya, crosslegged, Agent, Christounet, IntegralHamster, FlowJo, Arheus, leaf1742, Tompzini, pmatos, BHUNTER47, meiwanmeiliao, MoriG, mmcy123, chemmisst, elmers, 0123coolkid, booteskey, Piff, Crusader175, Nyx_01
Full list

Comments

on 9. September 2026, 06:58 by Crusader175
Beautiful construction!

on 17. August 2026, 09:50 by Christounet
Excellent! Loved the "inception" feeling in this puzzle. Thanks :)

on 16. August 2026, 21:04 by crosslegged
Great sandwich variant puzzle and a a lot of fun to figure out the logic.

on 16. August 2026, 12:42 by amirs
Such a clever puzzle. I really enjoyed it, and especially the final disambiguation

on 16. August 2026, 10:48 by Gunkan
Fascinating, Thanks

on 15. August 2026, 15:44 by Franjo
Thank you very much for creating and serving another delicious sandwich. What a wonderful taste!

on 15. August 2026, 10:34 by marcmees
Great puzzle fun. Thanks

on 14. August 2026, 20:20 by emoney1374
Phenomenal puzzle! I was surprised by and am in love with one of the last steps!!

on 14. August 2026, 17:49 by kublai
Amazing! Thank you for a fun puzzle.

on 14. August 2026, 17:15 by erml
Brilliant!

Difficulty:4
Rating:99 %
Solved:33 times
Observed:0 times
ID:000UCU

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Solution code:

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