International Braille Chess Association

The International Braille Chess Association (IBCA) is an organization for blind and visually impaired chess players. The International Braille Chess Association originated unofficially in 1951 with the organization of the first international correspondence chess tournament for blind players, by Reginald Walter Bonham; the tournament included 20 players representing 10 countries. It first organized a tournament in 1958, with representatives from seven countries. Today, it has grown to encompass over 50 member nations around the world.[1] The IBCA hosts two important competitions: the Blind Chess Olympiad and the Blind World Chess Championship.
Rule modifications.
Although most of the rules in blind chess are consistent with basic chess, there are a few modifications to the equipment to help blind and visually impaired players:
After making every move, each player is required to announce their move aloud to their opponent. Instead of writing the moves on a chess score sheet, the visually impaired player writes the moves in Braille or records the moves on a tape recorder.