Curling fans are buzzing again as the Winter Games bring a new twist to the sport. The American duo, Cory Thiesse and Korey Dropkin, are set to clash with Sweden for the mixed‑doubles gold. A victory would mark the first time the U. S. takes home a medal in this category, which only began in 2018.

If you’re new to curling, the game’s scoring can feel like a mystery. One odd detail that often catches the eye is the pair of tiny lights on each stone. These aren’t just decorative; they play a key role in keeping the competition fair.

Before a stone is released, the players tilt it up off the ice to activate its built‑in sensors. Once turned on, two white LEDs flash, signaling that the “hog line” system is live and ready. The hog line is a green mark on the sheet; a stone must be released before it crosses that line or a foul will be called. The lights help officials and players confirm the stone’s status in real time.

In short, a red light means the stone isn’t ready and could be disqualified if released early. A green light confirms it’s legal to play. The technology may seem high‑tech, but it ensures no one gains an unfair edge.

With the match starting at 12:05 p. m. ET on USA Network and Peacock, you can now share this cool fact with friends while cheering for the U. S. team.


# Curling Fans Buzz as Winter Games Add New Twist

**American duo Cory Thiesse and Korey Dropkin set to face Sweden for mixed‑doubles gold, marking a historic first medal for the U.S. in this event that debuted in 2018.**

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## How the Game’s Tiny Lights Keep It Fair

If you’re new to curling, the scoring can seem mysterious. One key detail is the pair of tiny lights on each stone:

- **Before release**: Players tilt the stone to activate built‑in sensors.
- **Red light**: Stone not ready; early release leads to a foul.
- **Green light**: Stone is legal to play.

These LEDs confirm the “hog line” system in real time. The hog line is a green mark on the sheet; a stone must be released before crossing it, or a foul will be called. The lights help officials and players verify the stone’s status instantly.

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## Tune In

- **Match time**: 12:05 p.m. ET
- **Broadcast**: USA Network & Peacock

Share this cool fact with friends while cheering for the U.S. team!



The Hidden Lights That Keep Curling Fair

How the Game’s Tiny Lights Keep It Fair

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