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To most western players, the game of Go is an enigma. Invented in China 4,000 years ago, it has no proper analogue in the West. It's like chess, but endlessly more complex. Focused more upon territory control and less about capturing the opponent's pieces, there are between 150-250 valid moves a player could make on any turn. For chess, this number never climbs above 37. It is said there have never been two identical games of Go, and there does not yet exist a computer program that can reliably beat Go experts - let alone the masters.