I monitor every move, yet I have no physical form. I can change the game with a single glance. What am I?

Category: Sports · Difficulty: expert

Hint: I help ensure fairness in competition.

Answer

Video review system

Explanation

The video review system assists referees by providing instant replays for critical decisions in various sports.

This is a expert sports riddle — one of the harder riddles here. The answer is Video review system.

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