Go originated in ancient China. Archaeological evidence shows that the early game was played on a board with a 17×17 grid, but by the time the game had spread to Korea and Japan, in about the 5th and 7th centuries AD respectively, boards with a 19×19 grid had become standard. The first 60 moves of a Go game, animated. This particular game quickly developed into a complicated fight in the lower left and bottom. Go is an adversarial game with the objective of surrounding more territory than one's opponent. As the game progresses, the board gets divided up into areas of territory, as outlined by groups of stones. These areas are then contested in local battles, which are often complicated, and may result in the expansion, reduction, or wholesale capture and loss of the contested area. The four liberties (adjacent empty points) of a single black stone (A), as White reduces those liberties by one (B, C, and D). If White plays at A, the black chain loses its last liberty.
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