From Markov Chains to Stochastic Games

Markov chains1 and Markov decision processes (MDPs) are special cases of stochastic games. Markov chains describe the dynamics of the states of a stochastic game where each player has a single action in each state. Similarly, the dynamics of the states of a stochastic game form a Markov chain whenever the players' strategies are stationary. Markov decision processes are stochastic games with a single player. In addition, the decision problem faced by a player in a stochastic game when all other players choose a fixed profile of stationary strategies is equivalent to an MDP.