El Turco
Kempelen would inform the player that the Turk would use the white pieces and have the first move. Between moves the Turk kept its left arm on the cushion. The Turk could nod twice if it threatened its opponent's queen, and three times upon placing the king in check. If an opponent made an illegal move, the Turk would shake its head, move the piece back and make its own move, thus forcing a forfeit of its opponent's move. Louis Dutens, a traveller who observed a showing of the Turk, attempted to trick the machine "by giving the Queen the move of a Knight, but my mechanic opponent was not to be so imposed upon; he took up my Queen and replaced her in the square from which I had moved her". Kempelen made it a point to traverse the room during the match, and invited observers to bring magnets, irons, and lodestones to the cabinet to test whether the machine was run by a form of magnetism or weights. The first person to play against the Turk was Count Ludwig von Cobenzl, an Austrian courtier at the palace. Along with other challengers that day, he was quickly defeated, with observers of the match stating that the machine played aggressively, and typically beat its opponents within thirty minutes.