A game of skill is a game where the outcome is determined mainly by mental and/or physical skill, rather than by pure chance.
One benefit of games of skill is that they are a means of exploring one's own capabilities. Games encourage the player to look at, understand, and experience things. They teach people lessons about themselves and possibly the world, and allow such insights to be passed on to others.
Some games of skill such as professional gaming and chess may involve psychological warfare.[1]
Most games of skill also involve a degree of chance, due to nature, a randomizing device (such as dice, playing cards, a coin flip, or a random number generator) or guessing by the players.
The distinction between "chance" and "skill" has legal significance in countries where chance games are treated differently than skill games. The legal distinction is often vague and varies widely from one jurisdiction to the next.