Alan is co-founder and CTO of Rasa, the leading open source conversational AI company.The Raspberry Pi is a tiny and affordable computer that you can use to learn programming through fun, practical projects.It is the idea behind Temporal Difference Learning (TD-learning): the agent gets a reward when it wins the game, this reward is then distributed to. You have to wait until the end of the game to know if the succession of actions you took led you to the victory. In connect 4, it is not possible to know if an action was a good move or a bad one.