Archive for August 14th, 2016

August 14, 2016

Rock Paper Scissors

rps

spock lizard by JDPD

Rock-paper-scissors (sometimes called ‘roshambo’) is a zero-sum hand game usually played between two people, in which each player simultaneously forms one of three shapes with an outstretched hand. These shapes are ‘rock’ (fist), ‘paper’ (flat palm), and ‘scissors’ (a fist with the index and middle fingers together forming a V). Each beats one of the other two, and loses to the other (i.e. ‘paper covers rock, but ‘scissors cut paper,’ and ‘rock crushes scissors’).

The players usually count aloud to three, or speak the name of the game (e.g. ‘Rock Paper Scissors!’ or ‘Ro Sham Bo!’), each time either raising one hand in a fist and swinging it down on the count or holding it behind. They then ‘throw’ by extending it towards their opponent. If both players choose the same shape, the game is tied and is usually immediately replayed. The game is often used as a choosing method in a way similar to coin flipping, drawing straws, or throwing dice. Unlike truly random selection methods, however, rock-paper-scissors can be played with a degree of skill by exploiting non-random behavior in opponents.

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