Simple, Putin would win. No one here mentioned that he is an 8th dan in judo. What does 8th dan mean?

Belt colors in judo are slightly different depending on which country you're in but the dan ranking system should be international. Dan means stage or step. I'll be specifically writing about dan awarded by Kodokan.

When you reach first dan that means you're no longer a junior and that you've mastered all the basics and are a decent judoka. When you reach third dan, you are qualified to teach judo. As you progress up the dan ladder, you are gain seniority and experience. 10th dan is the highest possible level. (Theoretically there are no limits but no one has ever gotten past 10th dan) That has only been awarded a handful of time since judo's inception. At the moment, there are only three living men who have attained 10th dan. All of them were born in the 1920s so they're all pretty old.

9th dan is also super exclusive. Really, you can't make 9th dan unless you dedicate all your time to the sport.

8th dan means you are, more or less, a master of judo. Add to this combat training he would have probably received as part of the KGB... Putin would take everyone out with no difficulties.

Source: https://www.quora.com/If-every-world-leader-was-put-in-a-room-and-started-fighting-which-one-would-win

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