The difference in Go is the sheer size of the game complexity. There are too many possible moves to calculate every action in "if/else" statements. The AI Goog

The difference in Go is the sheer size of the game complexity. There are too many possible moves to calculate every action in "if/else" statements. The AI Google created uses a combination of different learning algorithms (supervising it by teaching known Go patterns and playing it against itself millions of times to learn new strategies). Checkers is a solved game. There is a best move for each play and we just needed to build/process that giant decision tree. Go was a completely different beast, so it's pretty significant we found an algorithm that can beat a world class player.