Matryoshka Snova
(Published on 25. August 2025, 02:52 by timotab)
- Normal Sudoku rules apply: Place the digits 1-9 in every row, column, and box, without repetition.
- Russian Doll Sums: Clues outside the grid indicate that in that row or column, there exist two digits which sum to the clue, such that the digits between them also sum to the clue. If there are multiple clues in a row or column, the sequences of clued digits appear in the same order as the clues, and those sequences do not overlap.
- [Alternate framing of Russian Doll Sums: Each outside clue represents a sandwich where the two crust digits sum to the clue and so do the filling digits. Sandwiches in the same row or column appear in the same order as the clues and do not overlap]
As well as setting puzzles, I also solve puzzles on YouTube. Please check it out!
Solution code: Column 2
Comments
on 25. August 2025, 15:46 by Franjo
Tricky and lovely. Thank you very much for creating and sharing.
This interesting sandwich-twist was new to me. Is it your invention?
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It is not. It was part of a prompt for a speed setting competition a little over a year ago, and I decided to revisit the constraint recently.
on 25. August 2025, 14:00 by marcmees
Fun & easy. Thanks
on 25. August 2025, 06:30 by timotab
fixed solution code
on 25. August 2025, 06:09 by atmospherium
According to Sudokupad I completed the puzzle, but the solution code didn't work for me. I tried all columns and rows in case any worked and didn't find a successful entry.
Beyond that, this is my first puzzle with Russian Doll Sums and it was a very enjoyable solve.
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apologies, I had a typo in the code. Now fixed. --Timotab
