For top player Ke, it's a Go no-go

Despite losing the second game with Google's artificial intelligence program AlphaGo on Thursday, Ke Jie, the 19-year-old No 1 human Go player in the world, earned praise from experts and fans for his "incredible" performance.

Though the defeat means that AI has secured victory in the three-game match, the game itself mirrors the human tenacity and courage in the face of mounting pressure, experts said.