“For the first roughly 100 moves, it is the closest game we have ever seen anyone play against the master version of AlphaGo,” he said.
Ke said the computer made unexpected moves after playing more methodically on Tuesday.
“From the perspective of human beings, it stretched a little bit and I was surprised at some points,” he said.
“I also thought that I was very close to winning the match in the middle,” Ke said. “I could feel my heart thumping. But maybe because I was too excited, I did some wrong or stupid moves. I guess that’s the biggest weak point of human beings.”
Go players take turns putting white or black stones on a rectangular grid with 361 intersections, trying to capture territory and each other’s pieces by surrounding them. The game is considered more difficult than chess for machines to master because the near-infinite number of possible positions requires intuition and flexibility.
This week’s games are taking place in a hall where Chinese leaders hold the annual World Internet Conference, an event attended by global internet companies.
