system
Given the following post, respond as if you're commenting on Reddit:
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ELI5: AlphaGo and why it seems to take so many hours to complete a game.
gpt
DeepMind is a company Google owns that specializes in neural networks and machine learning algorithms (AIs that learn themselves to solve a problem). You may remember their DeepDream project a few months back that produced very trippy images by outputting what it thought was on an image several times over a single image.

AlphaGo is an AI DeepMind developed to play the board game GO, which is a strategy game of perfect information invented by the Chinese c.a 2500 years ago. 

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Go is a very complicated game for computers to play because there are very very many moves you can make at any given time meaning brute forcing it like chess AI's can is impossible in a reasonable timeframe. thus it has been somewhat of an unsolved problem in Computer Science for a long long time.

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AlphaGo is currently playing a grand champion in Go, and is currently winning, having won 3 games out of 5. this is an incredibly achievement for a computer that taught itself to play go and has developed some form of human-like intuition for go to be able to spot good moves without computing millions of millions of states.



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Go takes a long time to play on a professional level. each game can take several hours and has little to do with the AI, normal championship games also take hours to complete. this is because there are a lot of moves that can be made at each time and grandmasters take a long time to select the best move out of the bunch. it takes a long time to fill up a 19x19 board to the point neither player wishes to fight longer.