Tetro Snake

(Published on 20. July 2020, 20:30 by Carrick22)

Tetro Snake

In this puzzle, you must draw a snake (i.e. one cell-wide path) according to the following rules :

The snake must start/end at the two cells marked by a grey circle.
The snake cannot branch or touch itself orthogonally (it can touch diagonally).
The cells unused by the snake must form areas of size 4. The shape of these areas can be any tetromino possible (listed in the corner, can be rotated). These regions cannot touch each other orthogonally.
The cells marked with a letter must be inside of a tetromino corresponding to the letter. A "?" can denote any letter.

You can use Penpa-edit for solving it on your browser.

Solution code: Row A, followed by row B. Use "1" for snake and the corresponding letter for a cell within a tetromino (Example : 11JJJ11OO1).

Last changed on on 21. July 2020, 08:11

Solved by Lizzy01, NikolaZ, pokerke, stefliew, rimodech, athin, dylanamite, r45, dm_litv, Uhu, llo-7, jessica6, saskia-daniela, skywalker, Greg, jplank, logopolys, ffricke, amitsowani, Zzzyxas, Joo M.Y, ... Rollie, Ours brun, Laje6, fkil, GrabeR, Raistlen, tuace, CJK, kopfball, XoZu, Dugong, ManuH, Zenryo, ThithildeProuv, nmk1218, Mark Sweep, Javier Rebottaro, drf93, Jrgamer4u, puzzler05, hirassy

Full list

Comments

Last changed on 21. July 2020, 07:53

on 21. July 2020, 07:51 by stefliew
@jwmpuz All cells that are not on the snake must belong to a tetromino. No tetromino can be orthogonally adjacent to another tetromino.

It's implied by "areas of size 4" that these areas cannot be touching each other otherwise they'd combine to form an area of a bigger size, but hopefully this clarifies the rules for you.

on 21. July 2020, 07:47 by jwmpuz
Either I'm confused (likely) or the instructions are missing a constraint. Based on my interpretation of the rules and the version of the (English-version) puzzle I see, the # of solutions seem limitless. See for example https://imgur.com/a/74iJEgT