#Stockfish chess elo rating software#
The criteria an engine uses to decide its best move in a given position is programmed into the software by humans.ĪlphaZero used neither opening databases nor endgame tables, and nothing about the game was pre-programmed. Middlegame decisions are made using a process known as a search tree, looking ahead to see millions of possible candidate moves and then numerically evaluating and ranking them. Traditional chess engines have long depended on massive opening theory ‘books’ and endgame ‘tablebases’ that the software consults at appropriate points during a game. In a 100-game match, AlphaZero scored 28 wins and 72 draws, a staggering achievement even for advanced AI. With that, AlphaZero had learned enough to obliterate Stockfish. According to DeepMind, its AlphaZero neural network was taught only the rules of chess, then allowed to play against itself for a mere four hours. DeepMind, a British company now owned by Google that specialises in artificial intelligence, published a paper detailing the explosive entrance of a new champion in the computer chess arena. The correct answer happened to be Stockfish, but all three programs certainly play chess better than any human, including current world champion Magnus Carlsen. Had you asked any serious chess player on 5 December 2017 what the strongest commercially available chess software on the market was, mostly likely you would have heard names like Houdini, Komodo or Stockfish.
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