How to play Rock-Paper-Scissors-Lizard-Spock
Fans of The Big Bang Theory might have seen the episode where Sheldon and Rajesh try to decide whether to watch Saturn 3 or Deep Space Nine by playing “Rock-Paper-Scissors-Lizard-Spock” (“The Lizard-Spock Expansion”, season 2, episode 8).
Samuel Kass and Karen Bryla originally invented this modification of the popular Rock-Paper-Scissors game in 1998 to lower the perceived probability of 75-80% of games played between friends ending in ties.

While the rules for the original “Rock-Paper-Scissors” game are:
- Scissors cuts Paper
- Paper covers Rock
- Rock crushes Scissors
… the rules for the improved “Rock-Paper-Scissors-Lizard-Spock” version are:
- Scissors cuts Paper
- Paper covers Rock
- Rock crushes Lizard
- Lizard spoisons Spock
- Spock smashes Scissors
- Scissors decapitates Lizard
- Lizard eats Paper
- Paper disproves Spock
- Spock vaporizes Rock
- Rock crushes Scissors
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16 Feb 2010 








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This is one of the best episodes. I absolutely love ‘The Big bang Theory’.