1. The grandmaster played the program without physically moving chess pieces on a board or pressing the button of a chess clock.
2. The chess board was sold for more than 50 times the estimate despite lacking the white king which was damaged when the film was made.
3. chess board
3. Inside the walls are 93 streets that form a grid network similar to a chess board.
4. In October 2004 she played second board for the US Women's Team that won a silver medal in the Chess Olympiad in Spain.