|Obverse: In the middle of the coin is the most popular invention of Kempelen - chess machine, completed with illustrations from his scientific works. State symbol, nominal value and name of state Slovak republic, minting year 2004 are depicted in the coin too.|
Reverse: Portrait of Wolfgang Kempelen, under panorama of Bratislava - town where Kempelen was born, lived and worked. On the right are the years of his birth and death 1734 a 1840, on the left his name and surname WOLFGANG KEMPELEN. Under the panorama are initials of designer MR and mint mark MK.