Rock Paper Scissors (RPS) might seem like a simple children's game, but it has a rich history and has even been the subject of serious academic research on game theory and psychology.
The History of Rock Paper Scissors
The game originated in China during the Han Dynasty (206 BC - 220 AD) and was known as "shoushiling." It spread to Japan where it became "jan-ken" and eventually traveled to the West in the 20th century.
The Simple Rules
- Rock crushes Scissors
- Paper covers Rock
- Scissors cuts Paper
The Psychology of RPS
While our online version uses truly random computer choices, playing against humans reveals interesting psychological patterns:
Common Patterns
- Rock is the most common first throw (35% of the time)
- Winners tend to repeat their winning move
- Losers tend to switch to what would have beaten them
- Players often cycle through R-P-S in order
Mathematical Fairness
RPS is perfectly balanced - each choice beats one option and loses to another. Against a computer using true randomness, the expected win rate is exactly 33.3%.
Fun Facts
- The World RPS Society was founded in 1918
- Annual World Championships have been held since 2002
- A court case in 2006 was settled by RPS in Florida
- There's a 25-move variant called RPS-25
Test your luck against our computer opponent! Play Rock Paper Scissors now.
