I am very curious as I have seen many of them playing: How do visually disabled people learn chess? And what are all the types of equipment they use to learn the game?
There are chess sets made for the visually impaired. They are called 'tactile' chess sets. The game is played by touch. The pieces lock into the board. Removing a lock constitutes "touch move".
Here's an example, though I am not sure it is a 'tournament quality' tactile set.
