Many autistics have trouble with abstract reasoning and visual memory, which makes the game of chess particularly challenging. These Naef Bauhaus chess pieces, Designed by Josef Hartwig in 1923, are literal representations of their allowed moves (for example, the bishop is X-shaped, since it can only move diagonally). This design allows players to focus more on strategy, and less on retaining possible moves in visual memory; a feature particularly helpful to autistics. Chess board sold separately.

via uncrate.com