DarkSquares helps you master blindfold chess through a progressive training system. Start with fundamentals like square colors and coordinates, then advance to knight paths, tactical puzzles, and replaying famous games (Morphy, Kasparov, Carlsen) entirely in your head. The app gradually removes visual cues — from full board to silhouettes to complete blindfold. Play against AI at multiple difficulty levels without ever seeing the pieces. Available on web, iOS, and Android.