ELI5: Explain Like I'm 5

Bimatrix game

A bimatrix game is like a board game with two players. Each player has their own set of rules, and they have to decide what move to make in order to win the game. In a bimatrix game, each player has their own "matrix," which is like a map of the game board. Each square in the matrix has a letter that stands for a certain action that the player can take (like move this piece here, or attack that piece there). The goal of a bimatrix game is for one player to find a way to beat the other player by making the best possible moves.