Go's search space is larger than the number of atoms in the universe, making exhaustive search impossible. AlphaGo's core breakthrough was using neural networks to intelligently guide its search, evaluating only the most promising moves and making an intractable problem solvable.

AlphaGo's architecture mimicked human cognition by pairing a 'fast thinking' neural network for intuition with a 'slow thinking' search algorithm for explicit planning. This hybrid model, combining pattern recognition with calculation, proved more powerful for tackling complex problems than either approach alone.

In robotics, purely imitating human actions is insufficient. A model trained this way doesn't learn how to recover from inevitable errors. Comma AI solves this by training its models in a simulator where they are forced to learn recovery paths from off-course situations, a critical step for real-world deployment.

Instead of training on the single best action from its search (a one-hot label), AlphaGo's policy network learns to imitate the entire probability distribution of moves from MCTS. This 'soft label' contains far more information, enabling a much more effective and sample-efficient form of knowledge distillation.

Monte Carlo Tree Search (MCTS) acts as a 'policy improvement operator.' After the search finds a better move distribution, the policy network is trained to directly predict this improved distribution. This distills the expensive search process into the network itself, making it stronger over time.

Instead of a single "think then act" cycle, Minimax trains its M2 model to repeatedly pause and rethink after receiving feedback from the environment. This iterative "interleaved thinking" approach improves robustness and performance on long-horizon tasks where tool responses or conditions are unpredictable.

Humans stop analyzing a game when they intuit a winning or losing position. AlphaGo’s value function mimics this by predicting the eventual outcome from any board state. This allows the search to be drastically shortened, as it doesn't need to play out every possibility to the very end.

A powerful evaluation technique is to ask an AI agent to analyze its own poor output. The agent can review its context and process, explain why it made a mistake, and even suggest how to update its own instructions to prevent future errors.

Unlike typical reinforcement learning which learns from sparse win/loss signals, AlphaGo's method is remarkably stable. It uses MCTS to generate an 'improved' move for every state, turning the problem into a simple supervised learning task of imitating a better version of itself, avoiding high-variance gradients.