"Charles played chess using a special board with holes for the pieces and raised squares." [1]
"Are there any blind chess masters in the world? Have there been any throughout history? Yes. Al Sandrin, who died a few years ago, was an USBCA member who was a master." [2]
"Are there any blind chess masters in the world? Have there been any throughout history? Yes. Al Sandrin, who died a few years ago, was an USBCA member who was a master." [2]
[1] http://en.wikipedia.org/wiki/Ray_Charles
[2] http://www.americanblindchess.org/faq.html