Elliott Neff shows you how to develop a skill of playing "blindfold chess". First he demonstrates the fundamentals and then gives you the steps to forming the mental capability of visualization.
Elliott has played 12 games simultaneously, blindfold - not losing a single game!
https://www.chesshouse.com/blogs/chess-and-education/reaching-students-with-various-chess-skill-levels-in-the-same-group