An artificially intelligent (AI) machine has taught itself to play chess better than most humans in just three days. Computer programs like Deep Blue, which famously beat champion player Gary Kasparov in 1997, can already calculate millions of moves a second, but this new chess program, named Giraffe, is believed to be the first chess AI that uses an artificial “neural network” that mimics the human brain to formulate its moves and adapt over time. Details