El Ajedrecista

El Ajedrecista (Spanish: [el axeðɾeˈθista], lit. 'The Chess Player') is a chess-playing automaton designed by the Spanish engineer and inventor Leonardo Torres Quevedo. First demonstrated in 1913 and later exhibited in Paris in 1914, it played a simplified chess endgame with three chess pieces (white king and rook against black king) on a dedicated board without any human operator. A second, more compact electromechanical version was completed around 1920.

Unlike earlier so-called chess “automatons” such as the Mechanical Turk, Mephisto and Ajeeb, which relied on concealed human players, El Ajedrecista was a genuinely autonomous machine, playing chess without human guidance. It implemented the rules of the chosen endgame mechanically and electromechanically, detecting the opponent’s moves via an array of electrical contacts beneath the board and responding by moving its own pieces via an internal mechanism that enforced legal play and executed checkmate automatically.

Widely regarded as the first computer game in history, El Ajedrecista is considered one of the earliest genuine game-playing machines and a landmark in the development of decision-making automation and computer chess, anticipating later software-based chess programs by several decades.