Lee Sedol was rated #4 at the start of 2016, the year the match was played. 3 years later, aged 36,<p>> Lee announced his retirement from professional play, stating that he could never be the top overall player of Go due to the increasing dominance of AI. Lee referred to them as being "an entity that cannot be defeated"<p><a href="https://en.wikipedia.org/wiki/Lee_Sedol" rel="nofollow">https://en.wikipedia.org/wiki/Lee_Sedol</a><p>His rating seems to have crashed and burned from soon after the match in 2016 until his retirement in 2019..<p><a href="https://www.goratings.org/en/history/" rel="nofollow">https://www.goratings.org/en/history/</a><p>The #1 rated player is now Shin Jin-seo.<p>> In January 2019, Shin was defeated by South Korean Go program HanDol. The program defeated the top five South Korean go players. HanDol has been compared to AlphaGo, but is considered to be weaker.<p><a href="https://en.wikipedia.org/wiki/Shin_Jin-seo" rel="nofollow">https://en.wikipedia.org/wiki/Shin_Jin-seo</a>