Logic Masters Deutschland e.V.

Bow-A-Constrictor (Hidden Arrow + Snake Sudoku)

(Eingestellt am 28. Dezember 2021, 11:10 Uhr von Nordy)

To solve this Sudoku, you must find a snake's path through a field of hidden arrows.

Note: this puzzle can be quite tricky. I recommend first learning the rules and basic logic by working through the given example puzzle.

Rules:

  • Normal Sudoku: The digits 1 to 9 must appear in every row, column, and 3x3 box.
  • Hidden Arrows: digits along arrow stems sum to the digit in the corresponding circle—except all of the arrow stems are hidden. Each circle has exactly one hidden arrow stem that is at least 2 cells long and extends from its circle in a straight line, either horizontally or vertically. Arrows must not cross, overlap, or share cells with other arrows.
  • Snake: all non-arrow cells form a single snake, where a snake is a 1-cell wide path of orthogonally connected cells that does not touch itself orthogonally or form a loop (the snake has two ends, which must be determined). To be clear, if a cell is not on an arrow, that cell must be on the snake.
  • Equal Cage Sums: Within a cage, the sum of arrow cells equals the sum of snake cells, and each cage must contain at least one arrow cell and at least one snake cell.
  • Restriction on 1s: The digit 1 must only appear on arrows, and therefore must never appear on the snake.

Here is a 6x6 example puzzle that you can solve online at Penpa+, F-Puzzles, or CTC.

And here is the puzzle. You can solve online at:

Lösungscode: Row 1 then Row 5


Gelöst von bigger, Jesper, MagnusJosefsson, henrypijames, akodi, Muhammad, damasosos92
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Kommentare

am 17. Juni 2023, 19:39 Uhr von damasosos92
Wow I loved every inch of this one. Difficult, with a lot of case testing in my experience, but with lots of cruel and fantastic tight logic. I'm happy I solved it off-stream, because I had many minutes of completely staring at the grid.

Even when I found the snake, completing the grid was hard. Wow.

am 3. August 2022, 21:35 Uhr von Muhammad
Very nice puzzle, thanks.

Zuletzt geändert am 3. Januar 2022, 15:47 Uhr

am 3. Januar 2022, 15:47 Uhr von henrypijames
Gosh, that's a super hard, super tight solution path.

am 28. Dezember 2021, 20:55 Uhr von bigger
It's been a long time since I saw a 5 star snake. very nice

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ID:0008MD

Variantenkombination Online-Solving-Tool Wegerätsel

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Lösungscode:

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