Playing Connect Four with Deep Q-Learning

Towards Data Science / 5/4/2026

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Key Points

  • The article describes using Deep Q-Learning to solve the multiplayer game Connect Four using function approximation rather than tabular methods.
  • It frames the problem as learning an action-value policy by training a neural network to estimate Q-values from game states.
  • The piece emphasizes applying reinforcement learning techniques to game environments where the state and action spaces can be large or complex.
  • It presents the overall approach as an educational example of how deep RL can be used to learn effective gameplay strategies.

Solving multiplayer games with function approximation

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