
George Koltanowski the blindfold champion who was my chess coach at the Kolty Chess club in San Francisco in the early 1960 would say to me, "When I play blind fold it seems like many times I can see pieces and the tactics better, than when I am looking at the board."
How can that be? Because when playing blind he had to focus.

In high school I played blindfold chess every day in physics class with my friend, Tom. We got away with it for months until we were assigned a student teacher. One day she strolled up the aisle and found our physics notebooks (literally) filled with chess notation. The regular teacher had seen it but didn't know what it was, and evidently was too embarrassed to ask. We got busted and it was the end of our blindfold games. I won most of the games, but Tom went on to Princeton and Berkeley.
Chess notation! of course. I am sure I can do this if I can see the notation. I have attempted it multiple times, straight up blindfolded and lose my way by the middlegame. I will try this soon, thank you!