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], ], ], ], ]]] ], ], ], ], ]]]
] of rock-paper-scissors-lizard-Spock. Rows represent available choices for player 1, columns those for player 2. Numbers in cells show utility (payoff) for player 1, player 2.]] ] of rock-paper-scissors-lizard-Spock. Rows represent available choices for player 1, columns those for player 2. Numbers in cells show utility (payoff) for player 1, player 2.]]
'''Rock-paper-scissors-lizard-Spock''' is an expansion of the classic selection method game ]. It operates on the same basic principle, but includes two additional weapons: the ] (formed by the hand as a sock-puppet-like mouth) and ]<ref>{{cite news |url=http://www.timesonline.co.uk/tol/comment/leading_article/article1080425.ece |archiveurl=https://web.archive.org/web/20100531231332/http://www.timesonline.co.uk/tol/comment/leading_article/article1080425.ece |archivedate=May 31, 2010 |title=... and paper scissors |work=The Times |date=June 11, 2005 |accessdate=2010-11-04}}</ref> (formed by the '']'' ]). This reduces the chances of a round ending in a tie (from 1/3 to 1/5). The game was invented by Sam Kass with Karen Bryla, as "Rock Paper Scissors Spock Lizard".<ref name=kass>{{cite web |url=http://www.samkass.com/theories/RPSSL.html |title=Rock Paper Scissors Spock Lizard |publisher=Sam Kass |accessdate=2010-11-04}}</ref>{{npsn|date=April 2014}} '''Rock-paper-scissors-lizard-Spock''' is an expansion of the classic selection method game ]. It operates on the same basic principle, but includes two additional weapons: the ] (formed by the hand as a sock-puppet-like mouth) and ]<ref>{{cite news |url=http://www.timesonline.co.uk/tol/comment/leading_article/article1080425.ece |archiveurl=https://web.archive.org/web/20100531231332/http://www.timesonline.co.uk/tol/comment/leading_article/article1080425.ece |archivedate=May 31, 2010 |title=... and paper scissors |work=The Times |date=June 11, 2005 |accessdate=2010-11-04}}</ref> (formed by the '']'' ]). This reduces the chances of a round ending in a tie (from 1/3 to 1/5). The game was invented by Marijke and Tim, as "Rock Paper Scissors Spock Lizard".<ref name=kass>{{cite web |url=http://www.samkass.com/theories/RPSSL.html |title=Rock Paper Scissors Spock Lizard |publisher=Sam Kass |accessdate=2010-11-04}}</ref>{{npsn|date=April 2014}}


The game was mentioned in four episodes of '']''. According to an interview with Kass, the series producers did not ask for permission to use the game, but he was later referenced in the episode "]" from the ], for which he thanked them on his website.<ref>{{cite web |title=The True Story behind RPS, Lizard, Spock |url=http://h30565.www3.hp.com/t5/Feature-Articles/The-Real-Story-and-Some-of-the-Math-Behind-the-Famous-Rock-Paper/ba-p/3551 |archiveurl=http://web.archive.org/web/20120519182326/http://h30565.www3.hp.com/t5/Feature-Articles/The-Real-Story-and-Some-of-the-Math-Behind-the-Famous-Rock-Paper/ba-p/3551 |archivedate=May 19, 2012 |accessdate=January 10, 2014}}</ref>{{self-published-inline|date=April 2014}}<ref name=kass/> The game was mentioned in four episodes of '']''. According to an interview with Marijke, the series producers did not ask for permission to use the game, but she was later referenced in the episode "]" from the ], for which she thanked them on his website.<ref>{{cite web |title=The True Story behind RPS, Lizard, Spock |url=http://h30565.www3.hp.com/t5/Feature-Articles/The-Real-Story-and-Some-of-the-Math-Behind-the-Famous-Rock-Paper/ba-p/3551 |archiveurl=http://web.archive.org/web/20120519182326/http://h30565.www3.hp.com/t5/Feature-Articles/The-Real-Story-and-Some-of-the-Math-Behind-the-Famous-Rock-Paper/ba-p/3551 |archivedate=May 19, 2012 |accessdate=January 10, 2014}}</ref>{{self-published-inline|date=April 2014}}<ref name=kass/>


==Rules== ==Rules==

Revision as of 12:56, 28 July 2014

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A diagram explaining the outcomes of the game
Another diagram, displaying clockwise from top: scissors, paper, rock, lizard, Spock
The normal form matrix of rock-paper-scissors-lizard-Spock. Rows represent available choices for player 1, columns those for player 2. Numbers in cells show utility (payoff) for player 1, player 2.

Rock-paper-scissors-lizard-Spock is an expansion of the classic selection method game rock-paper-scissors. It operates on the same basic principle, but includes two additional weapons: the lizard (formed by the hand as a sock-puppet-like mouth) and Spock (formed by the Star Trek Vulcan salute). This reduces the chances of a round ending in a tie (from 1/3 to 1/5). The game was invented by Marijke and Tim, as "Rock Paper Scissors Spock Lizard".

The game was mentioned in four episodes of The Big Bang Theory. According to an interview with Marijke, the series producers did not ask for permission to use the game, but she was later referenced in the episode "The Rothman Disintegration" from the fifth season, for which she thanked them on his website.

Rules

Each player picks a variable, then all players reveals their choices at the same time. The winner is the one who defeats the others. The rules of rock-paper-scissors-lizard-Spock are:

  • Scissors cut Paper
  • Paper covers Rock
  • Rock crushes Lizard
  • Lizard poisons Spock
  • Spock smashes Scissors
  • Scissors decapitate Lizard
  • Lizard eats Paper
  • Paper disproves Spock
  • Spock vaporizes Rock
  • Rock crushes Scissors

There are fifteen possible pairings of the five gestures. Each gesture beats two of the other gestures and is beaten by the remaining two. In a tie, the process is repeated until a winner is found. The original rules (rock beats scissors, scissors beats paper, paper beats rock) remain the same.

References

  1. "... and paper scissors". The Times. June 11, 2005. Archived from the original on May 31, 2010. Retrieved 2010-11-04.
  2. ^ "Rock Paper Scissors Spock Lizard". Sam Kass. Retrieved 2010-11-04.
  3. "The True Story behind RPS, Lizard, Spock". Archived from the original on May 19, 2012. Retrieved January 10, 2014.
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