Computers are very good at the game of Go

Zen19 is beating extremely strong amateurs, but it hasn't beaten professionals in games with no handicap yet. That said, now that we know that Zen19 is using Monte Carlo strategies, the reason why it seems to be getting stronger as it's fed more CPU time is revealed: these strategies are the most obviously parallelizable algorithms out there, and for all we know this exact version of Zen19 could end up becoming World Champion if a few more orders of magnitude of CPU time were made available to it. Which would feel like a shame, because I was really looking forward to seeing us figure out how brains work.