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        riddles >> general problem-solving / chatting / whatever >> RPS and RPSLS
        
(Message started by: BenVitale on Oct 27^th, 2009, 11:05am)

Title: RPS and RPSLS
Post by BenVitale on Oct 27^th, 2009, 11:05am

RPS is the well-known 'Rock, Paper Scissors' game.
RPS is the world´s most popular method decision-making process
Rock beats Scissors, Scissors beats Paper and Paper beats Rock.

RPSLS is the 'Rock Paper Scissors Spock Lizard' game.

Has anyone tried it?

Scissors cuts Paper
Paper covers Rock
Rock crushes Lizard
Lizard Poisons Spock
Spock smashes Scissors
Scissors decapitates Lizard
Lizard eats Paper
Paper disproves Spock
Spock vaporizes Rock
and as always… Rock crushes Scissors

Watch it on video: http://www.wikio.com/video/1658495

when you know someone well enough, the probability any Rock-Paper-Scissors games you play with that person end up in a tie is high. The Rock Paper Scissors Spock Lizard game will reduce that probability. (in the video it says, 75 to 80% of the time due to limited number of outcomes)

http://fashionablygeek.com/wp-content/uploads/2009/01/rock-paper-scissors-spock-lizard.jpg

When you play Rock Paper Scissors, you will either lose, win or tie.
If you play Rock Paper Scissors Lizard Spock then there will be two options to win.

Share your thoughts

Title: Re: RPS and RPSLS
Post by rmsgrey on Oct 27^th, 2009, 11:57am

Of course, in a geek community, the probability of a tie may be higher with RPSLS...

Title: Re: RPS and RPSLS
Post by BenVitale on Oct 27^th, 2009, 1:06pm

on 10/27/09 at 11:57:31, rmsgrey wrote:

Of course, in a geek community, the probability of a tie may be higher with RPSLS...

Yeah. And in that geek community, some are willing to extend this game to 7 hand gestures

http://blog.timehorse.com/2009/02/rock-paper-scissors-lizard-zombie-spock.html

But, very few are willing to look at it from game theory perspective.

I don't want just to play this game, I would like to understand it better.

In the RPS game, there are 2 players.
Rock-Paper-Scissors is a mixed strategy game -- a game that puts equal probability on each of a player's actions ... each player plays each of the actions Rock, Paper, and Scissors with equal probability.

Rock-Paper-Scissors doesn't have a pure strategy Nash equilibrium (N.E.) ... it's more intuitive.

The 'Rock Paper Scissors Lizard Spock' is more complex, because there are 5 options and you can play this game with 2, 3, 4, 5 people.

I wonder about the N.E. ... Perhaps it cannot be found or perhaps by increasing the number of options, that is, with 5-hand gestures, 7-hand gestures, ... n-hand gestures, it would be possible to find a N.E.

Title: Re: RPS and RPSLS
Post by towr on Oct 27^th, 2009, 3:04pm

on 10/27/09 at 13:06:57, BenVitale wrote:

But, very few are willing to look at it from game theory perspective.

It's not like there is any compelling reason to, It's a completely symmetric game where strategy will not give you any advantage. Random play is the best you can do unless you know what your opponent will be doing (i.e. he uses a less than optimal strategy). It simply isn't interesting from a game-theoretic point of view; not everything is, no matter how hard you seem to try.

Title: Re: RPS and RPSLS
Post by ThudanBlunder on Oct 28^th, 2009, 12:35am

Never mind RPSLS, are you ready for 'Advanced' (http://worldrps.com/advanced-rps) RPS? ::)

Title: Re: RPS and RPSLS
Post by towr on Oct 28^th, 2009, 1:01am

From the page Thud linked to:

Quote:

The Character of Paper

Paper is often considered the most subtle throw. There is nothing aggressive about the limp documents that move through our desks and offices. [...]

The people that wrote that must never have had a paper cut.