Logic Masters Deutschland e.V.

Rules: Slitherlink variant
1. Connect orthogonally adjacent dots to form a single loop. The loop may intersect itself. However, if all four edges incident to a dot are used, the loop cannot turn and must travel straight through the dot.
2. The loop divides the grid into 3 types of regions: a) regions outside the loop, b) snake regions inside the loop, and c) a single non-snake region inside the loop. A snake region is an orthogonally connected 1-unit-wide path of two or more squares that never touches itself, not even diagonally.
3. A given number represents either the number of edges surrounding it that are part of the loop, or the size of the snake region containing it.
4. A snake region must contain at least one number indicating its size.



You can solve the puzzle here.

This is one of 12 disjoint puzzles I made this year with varying styles/difficulties themed around snakes and 2025.
Enjoy!