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Curious Cheetah

Square Routes

Background

This puzzle appears in "Challenge Your Brain Math & Logic Puzzles" (Dave Tuller & Michael Rios, Puzzle Wright Press). It is similar to Masyu.

Puzzle and Goal

An unsolved puzzle consists of a rectangular grid; some cells contain a white or black circle.
The goal is to create a single closed loop that satisfies the clues.

Rules

The solved grid must satisfy the following conditions: