Blindfold - Version 1.1 The program includes a Test and a Game. It is intended to improve the speed of comprehension and to extend the capacity of operative memory. From point of view of chess this program is aimed at diagnosing and training a chessplayer's intellectual faculties called variations calculation and visualization. The Game is a good tool to train your blind play as well. Interpretation of testing results is based on data from numerous psychological studies featuring the participation of more than 200 chessplayers with qualification ranging from novices to international grandmasters (with an Elo of about 2,600).