Snake (Logical Puzzles Series #11)

When first time I got introduced to this puzzle type, its name was Tunnel puzzle. However, later it got famous with the name Snake puzzle and it is used with the name Snake when this puzzle type appears in World Puzzle Championships. This is the old Snake puzzle which I am re-publishing as the 11th puzzle in the Logical Puzzles Series.

Rules of Snake puzzle

Draw a snake in the grid, whose head and tail (if given) are greyed squares. The snake doesn't touch itself, not even diagonally. The number outside shows the count of squares covered by the snake body in the corresponding row or column.