That 1 lost was purely intentional. "Behaviour analysis when unsure. Complete. Analysis when confident. Complete. Analysis when stressed. Complete. Must analyze behaviour when he feels superior by winning to complete analysis. Only then I can secure 99.999999% chance of victory."
It's cool what this kind of stuff can do, long way off scary AI in my opinion (not that I know a lot), this is only good at playing go so no worries for world domination yet. The work on neural networks and deep learning etc in general is pretty cool/scary though.
Given how antiquated the systems for firing nukes are [the US ones at least], an AI probably couldn't launch them even if it wanted to... But in any case, I'll take artificial intelligence over natural stupidity [Drumpf]...