During his time in Korn's studio, Hartwig met a number of prominent architects including Theodor Fischer and August Endell.

[3] After his tenure at the Bauhaus, Hartwig continued producing sculptural work and began a brief career in art restoration.

First, they abstract the visual appearances of traditional chess pieces into simple geometric shapes.

Second, the shape of each piece reflects how it moves: pawns and rooks move in straight lines and are represented as rectangular prisms, the bishops feature diagonal lines, the king has both straight and diagonal elements, and the knights are L-shaped.

As was the case with most Bauhaus products, this was too expensive for most consumers, and the chess sets remained a luxury item sold in small numbers.