The origin of this puzzle is not known.
Puzzle and Goal
An unsolved puzzle consists of a rectangular grid. Some cells are black; some of those cells have numbers and arrows.
The goal is to place 5-square snakes into the white cells.
The solved grid must satisfy the following conditions:
Snakes are series of numbers 1 to 5.
Clues indicate the next number visible in the direction indicated.
Two snakes cannot touch orthogonally.
The head of the snake (1) cannot see another snake in the rank ahead of it.