Rock, Scissors, Paper

Rock, Scissors, Paper is a popular game.
Rock-paper-scissors is a hand game played by two people. The game is also known as roshambo or another ordering of the three items (with "stone" sometimes substituting for "rock").
The game is often used as a choosing method in a way similar to coin flipping, drawing straws, or throwing dice. However, unlike truly random selection methods, rock-paper-scissors can be played with a degree of skill, especially if the game extends over many sessions with the same players; it is often possible to recognize and exploit the non-random behavior of an opponent.

The players count aloud to three, or speak the name of the game (e.g. "Rock Paper Scissors!"), each time raising one hand in a fist and swinging it down on the count. After the third count (saying, "Scissors!"), the players change their hands into one of three gestures, which they then "throw" by extending it towards their opponent. Variations include a version where players use a fourth count—"Shoot!"—before throwing their gesture, or a version where they only shake their hands twice before "throwing." The gestures are:
Rock, represented by a clenched fist.
Scissors, represented by two fingers extended and separated.
Paper, represented by an open hand, with the fingers extended and touching (horizontal).
The objective is to select a gesture which defeats that of the opponent. Gestures are resolved as follows:
Rock blunts or breaks scissors: that is, rock defeats scissors.
Scissors cut paper: scissors defeats paper.
Paper covers, sands or captures rock: paper defeats rock.
If both players choose the same gesture, the game is tied and the players throw again.

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