Computers remain undefeated on chess board for 20 years

Go player Lee Sedol (R) places his first stone down during the last match of the Google DeepMind Challenge Match, where he played against Google's artificial intelligence program AlphaGo in Seoul, South Korea, on March 15, 2016. [Photo/Agencies]

AlphaGo vs Lee Sedol (March 2016)

In 2016, AlphaGo managed to win a series of games of Go 4-1 against South Korea's world-class player Lee Sedol.

The final winner was already determined as Lee lost the first three games of the five-game match. AlphaGo won a $1 million prize, which was then donated to charities.

The human Go champion beat the artificial intelligence (AI), developed by Google's London-based AI subsidiary DeepMind, in the fourth match; however, Lee was defeated once again in the final match.