If you scrunch your eyes up just as an offensive line sets for a play, the outlines of the players look like chess pieces ...

The first machine had a vertical board. Of course, it couldn’t play a full game of chess. The machine always played white with a king and rook in a fixed position. The human’s lone black king ...

the outlines of the players look like chess pieces being moved around the board by some invisible hand. Some run in the straight lines followed by a rook, some follow the diagonals of a bishop ...

Did you now, that on the very 1st move, either side has a choice between 20 possibilities over the chess board? That’s a whole ... same diagonal or Queen and Rook on the same file.