eidetic memory, n.All

Eidetic memory (n.) has ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠nothing of a photograph: the player sees neither the green of the board nor the shadows of the pieces, only what bears on the game.

Eidetic memory (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠not the sign of a great mind: the best chess players can hold only two games at once, and young prodigies who can see their sums are often unable to go on in mathematics.