AlphaZero vs Stockfish 8: A Landmark Battle of Human and Artificial Intelligence in Chess

David Georgyan
4 min readFeb 20, 2023

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Chess has long been regarded as one of the most intellectually challenging games in the world. It requires a deep understanding of strategy and the ability to anticipate and react to an opponent’s moves. For years, chess has been dominated by human players who have honed their skills through years of practice and experience. However, in recent years, artificial intelligence has emerged as a formidable opponent on the chessboard.

In 2017, Google’s artificial intelligence company DeepMind introduced AlphaZero, an AI system that could teach itself how to play chess, shogi, and Go. This was a major breakthrough in the field of artificial intelligence, as it demonstrated that an AI system could teach itself how to play a complex game without human intervention. AlphaZero used a combination of reinforcement learning, neural networks, and Monte Carlo tree search to teach itself how to play chess at a level that surpassed that of the best chess engines at the time.

One of the most significant demonstrations of AlphaZero’s capabilities was a series of games played against the popular chess engine Stockfish 8. Stockfish 8 had long been regarded as the strongest chess engine in the world, having won the Top Chess Engine Championship (TCEC) multiple times. The games between AlphaZero and Stockfish 8 were closely watched by chess enthusiasts around the world, as they represented a battle between the best human-designed chess engine and an AI system that had taught itself how to play.

The games between AlphaZero and Stockfish 8 were played using a unique format, with each game limited to a maximum of four hours. AlphaZero won 28 of the 100 games played, while Stockfish 8 won none. The remaining games were drawn. These results were shocking to many in the chess community, as Stockfish 8 had long been considered unbeatable.

The games between AlphaZero and Stockfish 8 revealed the strengths and weaknesses of both systems. Stockfish 8 was incredibly strong in tactical positions, using brute-force calculation to quickly analyze a large number of possible moves. AlphaZero, on the other hand, was more flexible and adaptive, relying on its neural network to evaluate the strength of different positions and making strategic decisions based on that evaluation.

The games between AlphaZero and Stockfish 8 marked a significant milestone in the development of artificial intelligence. They demonstrated that an AI system could teach itself how to play a complex game at a level that surpassed that of the best human-designed chess engines. However, they also showed that there is still much to be learned about how to create AI systems that can truly understand and play complex games like chess.

The games between AlphaZero and Stockfish 8 were also significant because they showed that the way AI systems approach complex problems can be different from the way humans approach them. AlphaZero’s ability to teach itself how to play chess using only the rules of the game and reinforcement learning was a remarkable feat that showed the power of deep learning algorithms.

One of the most interesting aspects of AlphaZero’s approach was its reliance on intuition and pattern recognition. Instead of relying on brute-force calculation, AlphaZero used its neural network to evaluate the strength of different positions, based on a process that was similar to how humans recognize patterns. This allowed AlphaZero to identify strategies and positions that had not been seen before and to develop new tactics that were effective against Stockfish 8.

The games between AlphaZero and Stockfish 8 also raised questions about the future of chess and other games in a world dominated by AI systems. With the rise of AI, it is possible that traditional games like chess may become less relevant as AI systems develop new games and new ways of thinking about games. However, it is also possible that the development of AI systems will lead to new insights into the way humans think about games and new ways of approaching complex problems.

It is also important to note that AlphaZero’s success was not limited to chess. In fact, the same approach that AlphaZero used to learn how to play chess was also used to teach itself how to play shogi and Go, two other complex strategy games. In both cases, AlphaZero was able to achieve levels of play that surpassed the best human players and the best computer programs.

In conclusion, the chess battle between AlphaZero and Stockfish 8 was a landmark moment in the history of artificial intelligence and computer games. It demonstrated the power of deep learning algorithms and the potential for AI systems to surpass human intelligence in complex problem-solving tasks. It also highlighted the differences between the way humans and AI systems approach complex problems, and the potential for AI to revolutionize the way we think about games and other complex problems in the future. As AI continues to develop and improve, it will be interesting to see how it affects our understanding of games, intelligence, and the human mind.

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