## Archive for the ‘Snake’ Category:

### Swivelling Serpents [Birthday Surprise] by Prasanna Seshadri

(Note: This bonus puzzle is being posted today to mark the occasion of Prasanna’s birthday.)

PDF

Theme: One Away from Thirty

Author/Opus: This is the 180th puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Locate two snakes in the grid. Each snake must start from one of the gray circles, but has an unknown ending point. Black circles represent an interior cell of one of the snakes, and all black circles must be part of a snake. Each snake’s path is allowed to move vertically, horizontally, or diagonally between cells. An interior snake cell can only be adjacent to two other snake cells (including diagonally adjacent cells) and an end of the snake can only be adjacent to one other snake cell (including diagonally adjacent cells). The two different snakes must not share any adjacent cells.

There are some numbers outside the grid. These numbers indicate the number of vertical or horizontal edges (not corners) that snakes cross in that direction.

There are some letters inside the grid. For each distinct letter, exactly one of its instances is visited by one of the two snakes.

Also see this example:

Solution: PDF

### Pentosnake by Nikolai Beluhov

PDF

Theme: One Letter Clue

Author/Opus: This is the 3rd puzzle from guest contributor Nikolai Beluhov.

Rules: Draw a snake (a 1 cell-wide path) in the grid whose head and tail are given by circled cells. The snake can touch itself diagonally, but cannot touch itself orthogonally. All cells that are not part of the snake must be part of a pentomino (i.e., an orthogonally connected group of five cells). These unused pentominoes cannot touch orthogonally but can touch diagonally. A letter in a cell represents the pentomino shape that the cell belongs to. Pentomino shapes can be repeated in the grid, and can also be rotated and reflected. (Lettered cells cannot be used by the snake.)

Answer String: Enter the number of cells in each of the snake segments from left to right for the marked rows, starting at the top. Separate each row’s entry with a comma.

Time Standards (highlight to view): Grandmaster = 4:45, Master = 7:15, Expert = 14:30

Solution: PDF; a solution video is available here.

### Bonus: Prime Snake by Serkan Yürekli

PDF

Theme: Clue Symmetry and Logic

Author/Opus: This is the 95th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Fill in every circle inside and outside the grid with a prime number. (All prime numbers inside and outside the grid are marked.) Then locate a numbered snake (a 1-cell wide path) that starts with 1 and goes to 45 (1 to 11 in example). The snake cannot touch itself, not even diagonally. Digits outside the grid indicate how many cells in that row or column are occupied by the snake.

Answer String: Enter the length in cells of each of the snake segments from left to right for the marked rows, starting at the top. Separate each row’s entry with a comma. The answer to the example is “3,11”.

Time Standards (highlight to view): Grandmaster = 3:45, Master = 5:30, Expert = 11:00

Solution: PDF

### Sea Serpent by Serkan Yürekli

PDF

Theme: Clue Symmetry and Logic

Author/Opus: This is the 95th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Draw a snake (a 1 cell-wide path) in the grid whose head and tail are given by circled cells. The snake can touch itself diagonally, but cannot touch itself orthogonally and cannot pass through any blackened cells. The given numbers show the total number of cells are used by the snake in the grid along the indicated directions. (Numbers see to the border of the grid.)

Answer String: Enter the length in cells of each of the snake segments from left to right for the marked rows, starting at the top. Separate each row’s entry with a comma. The answer to the example is “13,2”.

Time Standards (highlight to view): Grandmaster = 4:45, Master = 9:00, Expert = 18:00

Solution: PDF

### Sigma Snake by Serkan Yürekli

PDF

Theme: Clue Symmetry and Logic

Author/Opus: This is the 94th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Add letters to some empty cells to make a snake that doesn’t touch itself, not even diagonally. The snake’s head and tail are indicated by circles. The snake is made out of spelled out numbers, and some letters are given that must be part of the snake. Each numbered cell indicates the total sum of the distinct words that touch that cell, including diagonally. Not all words need to be used, but no word is used more than once.

Answer String: Enter the length in cells of each of the snake segments from left to right for the marked rows, starting at the top. Separate each row’s entry with a comma. The answer to the example is “3,31”.

Time Standards (highlight to view): Grandmaster = 4:30, Master = 7:30, Expert = 14:00

Solution: PDF

### Snake Egg by Serkan Yürekli

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Theme: First Born Eggs

Author/Opus: This is the 93rd puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Draw a snake (a 1 cell-wide path) in the grid whose head and tail are given by circled cells. The snake can touch itself diagonally, but cannot touch itself orthogonally or revisit any square. Besides the snake, the remaining cells must form exactly nine white areas, one of each size from 1 to 9. Numbers in the grid must be part of white areas of the indicated size.
(Also see here)

Answer String: Enter the length in cells of each of the snake segments from left to right for the marked rows, starting at the top. Separate each row’s entry with a comma.

Time Standards (highlight to view): Grandmaster = 4:15, Master = 6:00, Expert = 12:00

Solution: PDF

PDF