Curious Cheetah
Magic Labyrinth
Background
The origin of this puzzle is not known.
Puzzle and Goal
An unsolved puzzle consists of a square grid. Walls have been marked off to indicate a single path through all cells in the grid; a circle indicates the start of the path.
The goal is to place numbers in some of the cells to satisfy the rules.
Rules
The solved grid must satisfy the following conditions:
Each number that appears in the puzzle must appear exactly once in each rank.
Numbers must appear in order traveling along the path (1-2-3-1-2-3, and so on).