It is a proven fact that skill games helps keep the mind sharp and good for everyone. A game of skill is where the outcome of the game is determined mainly by the mental, and not by random chance.
There are many benefits of skill games, one is they are a way to explore your own capabilities, by encouraging you to look, and understand, also to experience different things.
Skill games teach you lessons about yourself and possibly the world. A lot of skill games have some degree of chance, and these days the difference between games of skill and chance have a legal challenge in some countries. This is the reason that games of chance and the games of skill are looked at differently. The difference is vague so it will vary from one state to the next.