Blindfold Chess is a time-honoured chess variant (the earliest mention of blindfold chess is from the seventh century) that is not represented on the Chess Variants pages(?). I have created a zrf downloadable here.
Be warned that, although many sources view it as a method of increasing one's playing strength, simultaneous blindfold exhibitions were officially banned in 1930 in the USSR as they could be injurious to health. To avoid chronic brain damage this program lets you view parts of, or the entire piece set, in the form of anonymous markers. Wikipedia has an article on Blindfold chess here. --Mats
Be warned that, although many sources view it as a method of increasing one's playing strength, simultaneous blindfold exhibitions were officially banned in 1930 in the USSR as they could be injurious to health. To avoid chronic brain damage this program lets you view parts of, or the entire piece set, in the form of anonymous markers. Wikipedia has an article on Blindfold chess here.