It's an interesting turn of events, particularly after Ke once said he didn't want to play Google's Deepmind computer because it would learn his playing style. "I don't want to play against AlphaGo because I can tell from its performance that it is weaker than me," he told Chinese media. "I don't want it to copy my patterns and learn from me."

Those emotions changed when 33-year-old 9th dan professional Lee Sedol was finally defeated by AlphaGo. The win is considered a huge milestone for artificial intelligence given the complexity of the Chinese board game.

Although Ke is also a 9th dan player and currently the world's number one (beating Sedol on his way to a championship win earlier this year), the Korean is considered the Roger Federer of Go and was chosen for the Deepmind showdown based on his experience. Ke now has the chance to prove he's not all talk and cement his reputation as the game's best player.

Update: Deepmind co-founder Demis Hassabis released a statement on Twitter confirming that nothing has officially been put in the diary: