AlphaGo completes match 4-1 up

AlphaGo completed the Google DeepMind Challenge Match with a fourth win to Lee Sedol's one.

In a very close fifth game, AlphaGo threatened to get a very large middle that Lee Sedol had to reduce in order to win. After playing a defensive move that also attacked, AlphaGo looked like getting enough, and, despite Lee Sedol's best efforts, AlphaGo was a couple of points ahead with the komi. With just the smallest yose left, Lee Sedol resigned.

At the closing ceremony, thanks were said and plaudits given to both sides. The million dollar prize will go to various charities.

Some more detailed commentary and pictures were available on the GoGameGuru website.

Detailed game records and notes about the match can be seen here.