Eli5: How are computers better at video games?

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I was watching a chess video and Deep Blue, the IBM computer, was able to beat the best Chess player in the world at the time. If we made the computer and it bases its moves off of moves already made in real life shouldn’t we be able to beat computers like any other player? This isn’t chess specific but can be for any multitude of games.

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Anonymous 0 Comments

>If we made the computer and it bases its moves off of moves already made in real life

This is the big problem in chess – and also in millions of other games. There are simply billions and billions of possibilities, and most of them have never happened in real life.

In chess, almost every game reaches a brand-new position – a sequence of moves that has *never* been made in history – after somewhere between 6 and 15 moves. Which means even if you had a computer with unlimited memory, with every game *ever played by anyone* saved, it would run out of matches after only a few moves.

Instead of doing that, we make computers that are able to pick their own moves – they look several moves into the future, along thousands or millions of possibilities, and pick the one move that is most likely to win. Computers can do that much faster and more accurately than any human player – there are just too many possibilities once you get a few moves ahead of the current position. The same idea applies to just about any game, because there are just too many possible actions to calculate.

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