Mechanical Turk

The Mechanical Turk (German: Schachtürke, lit. 'chess Turk'), also known as the Automaton Chess Player or simply the Turk (Hungarian: A Török), was a chess-playing machine first displayed in 1770, which appeared to be able to play a strong game of chess autonomously, but whose pieces were in reality moved via levers and magnets by a chess master hidden in its lower cavity. The machine was toured and exhibited for 84 years as an automaton, and continued giving occasional exhibitions until 1854, when it was destroyed in a fire. In 1857, an article published by the owner's son provided the first full explanation of the mechanism, which had been widely suspected to be a hoax but never accurately described while the machine still existed.

Constructed by Wolfgang von Kempelen to impress Empress Maria Theresa, the Turk won most games, including those against statesmen such as Napoleon Bonaparte and Benjamin Franklin. It was purchased in 1804 by Johann Nepomuk Mälzel, who continued to exhibit it. Chess masters who operated it over this later period included Johann Allgaier, Boncourt, Aaron Alexandre, William Lewis, Jacques Mouret and William Schlumberger, but its operators during Kempelen's original tour remain unknown. The device could also perform the knight's tour, a puzzle that required the player to move a knight to visit every square of a chessboard exactly once.