El Ajedrecista

[3] As opposed to the human-operated Mechanical Turk and Ajeeb, El Ajedrecista had a true integrated automation built to play chess without human guidance.

[5] In 1951, El Ajedrecista defeated Savielly Tartakower at the Paris Cybernetic Conference, being the first Grandmaster to lose against a machine.

[7] If an illegal move was made by the opposite player, the automaton would signal it by turning on a light.

[8] The pieces had a metallic mesh at their base, which closed an electric circuit that encoded their position in the board.

[10] It also included a sound effect, with a voice recording announcing checkmate when the computer won the game.