Can You Beat the Rock-Paper-Scissors Supercomputer?

Andy Chalk

One Flag, One Fleet, One Cat
Nov 12, 2002
45,698
1
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Can You Beat the Rock-Paper-Scissors Supercomputer?


Maybe you think you're good at Rock-Paper-Scissors, but are you good enough to come out on top in a no-holds-barred battle with Skynet?

We all know how to play Rock-Paper-Scissors and those of us with time on our hands may even have some kind of half-baked strategy to keep us at the top of the heap. But is it good enough to beat down a mighty machine intellect? Now you can find out!

NYTimes.com [http://www.nytimes.com/interactive/science/rock-paper-scissors.html?hp] is running a "You vs. The Computer" game of Rock-Paper-Scissors which is pretty much exactly what it sounds like: select rock, paper or scissors, then watch as a human and robot hand square off with three shakes and a gesture to determine ultimate victory. Wins, losses and ties are tracked for each session, and you can play as often as you like.

"A truly random game of Rock-Paper-Scissors would result in a statistical tie with each player winning, tying and losing one-third of the time," the site notes. "However, people are not truly random and thus can be studied and analyzed. While this computer won't win all rounds, over time it can exploit a person's tendencies and patterns to gain an advantage over its opponent."

At the novice level, the computer starts with nothing and adjusts it play based on yours, while the veteran level gives it access to data acquired through thousands of games played against other people. There's also an option to "see what the computer is thinking," which displays the process of recall and comparison it uses to determine its next move.

At novice difficulty I was able to edge out the computer in a race to 20 by a few rounds; at veteran, it turned the tables, beating me 20 to 19, with 21 ties. Would the gap grow wider the longer I played? Maybe, but hey, I can't blow my whole day playing rock-paper-scissors. And I am, to be frank about it, a pretty awesome RPS man.

Can you do better? Did you? Take your shot at the machine and then post a screen to show us what you've got!


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Mr.Pandah

Pandah Extremist
Jul 20, 2008
3,967
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Damn, my tried and true method of throwing nothing but rock failed me. Oh well. It always works on people though so it's okay.
 

JediMB

New member
Oct 25, 2008
3,094
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Attempting to actually outsmart it, I got a 10-3-7 against the Veteran AI.

Had to leave the room in the middle of the match and lost my focus, so I'm convinced that I could have done better.
 

SilentHunter7

New member
Nov 21, 2007
1,652
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[http://img64.imageshack.us/i/beatcomp.jpg/]

Uploaded with ImageShack.us [http://imageshack.us]

22-20 me.

There was a point where I was beating it 20-11, but he managed to come back and tie it at 20. Thank god I managed to hold him off haha
 

cynicalsaint1

Salvation a la Mode
Apr 1, 2010
545
0
21
Beat me both times to 20, though it was closer against Veteran mode.
I found I did best when I forced myself not to think too much about my next throw, easier said than done though.
 

BreakfastMan

Scandinavian Jawbreaker
Jul 22, 2010
4,367
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I got 9-5-7 when I played it. There was one moment were the computer actually could not figure out what I was going to do next, and threw random. Awesome.

EDIT: Oh yeah, this was on veteran mode. Take that!
 

Ne1butme

New member
Nov 16, 2009
491
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15 - 2 -3 on veteran for me. I found the computer isn't very good at exploiting repeated symbols. if we tied on scissors, it would assume that i would switch to rock, so it would play paper. But i wouldn't switch on a tie, thus winning every round after a tie.

I used other tricks as well. GG


edit: oh and i forgot that the veteran rarely expects you to play the same symbol twice in a row. so, i win with paper, then play paper again, winning again cause the computer expected me to change.
 

Notsomuch

New member
Apr 22, 2009
239
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25/20/18 novice.
15/9/15 Veteran.

Well played, robot!

The hard part is recognizing your own patterns and subverting them.
 

C95J

I plan to live forever.
Apr 10, 2010
3,491
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I did first to 20 and here was the outcome against the Veteran Computer:


Quite pleased with myself actually :)
 

WorldCritic

New member
Apr 13, 2009
3,021
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At 50 rounds I got 20 wins, 15 ties, and 15 losses. I feel like I could have done better though.
 

Ben Simon

New member
Aug 23, 2010
103
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A truly random game would not necessarily have a even win-lose-tie score. It would be random, therefore unpredictable.
 

Raesvelg

New member
Oct 22, 2008
486
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Apparently it has a hard time analyzing me, since pretty much every game I played on Veteran wound up being dead even across the board in win/tie/loss. It would shift by a couple points at any one time tops, but always leveled out rather quickly.

Edit: Though apparently I got somewhat better at predicting what IT will predict, since I can now reliably beat the veteran setting.

Edit AGAIN: And in an amusing twist, you can cheat in this game. Someone probably should have set the "What the Computer is Thinking" to report its logic on the LAST set of moves, not the CURRENT set of moves.