While solving a game you should keep in mind that the players are rational. They think about their payoffs only. In their celebrated book "The Theory of Games and Economic Behaviour" John von Neumann and Oscar Morgenstern defined a game as any interaction between agents that is governed by a set of rules specifying the possible moves for each participant and a set of o... https://www.expertsmind.com/topic/game-theory/solution-concepts-of-non-cooperative-games-93104.aspx