The world uses the same system but there is a difference. The online rating system is a bit inflated, meaning that most people who are "1400" would really be about "1300" in the real world. It's still the same idea in terms of how the ratings work though.
Chess Rating System
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I wondered, what is the main rating system that the world uses? I use the chess' n math rating system, and I know I have a rating in live chess, but I wonder if the world uses it..