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Curious Cheetah

Tic-Tac-Logic

Background

The name is a reference to the popular game Tic-Tac-Toe. However, the goal is the opposite: You're avoiding making three-in-a-row sets.

Puzzle and Goal

An unsolved puzzle consists of a square grid. Some squares have x or o in them.
The goal is to fill each cell with an x or an o.

Rules

The solved grid must satisfy the following conditions:

Other Names

3-in-a-Row

Playable Online