20 possible moves. So black chooses a move. Now white can move again. This next move depends on the first move that white chose to make, but there are about 20 or so moves white can make given the current board position, and then black has 20 or so moves it can make, and so on. This is how a computer looks at chess. It thinks about it in a world Clear Spring best isp, Clear Spring, MD isp best Clear SpringClear Spring isp, best Maryland, Clear Spring best isp
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