Rock Paper Scissors
Best the computer at rock, paper, scissors. Build a streak.
How to play Rock Paper Scissors
Pick rock, paper, or scissors. Rock beats scissors, scissors beats paper, paper beats rock. Win the round and your streak grows; a loss resets it. Chase the longest winning streak you can against the computer.
It is less random than it looks
Rock Paper Scissors feels like a coin flip, but between real players it is a game of habits, and a computer opponent usually has habits too. A few tendencies show up again and again in people: they throw rock first more often than the other two, especially when they are competitive or new to it; they rarely repeat the same throw three times running; and there is a strong win-stay, lose-shift pattern, where a player who just won tends to play the same move again while a player who just lost switches to whatever would have beaten them. Watch for those and you are no longer guessing blind.
Playing the streak
Because a win here builds your streak and a loss wipes it clean, the pressure sits on stringing correct reads together. If the computer leans on any pattern, the counter is to think one step ahead: if it tends to switch after losing, work out what it is likely to switch to and beat that instead. Mixing up your own throws matters just as much. Fall into a rhythm and a reactive opponent will read you exactly the way you are trying to read it. When you genuinely cannot find a pattern, spreading your three choices roughly evenly is the safest baseline, because any bias you show is a bias that can be punished. One more habit worth stealing from tournament players: decide your throw before the moment arrives, and commit. The old joke is that a rushed hand throws rock, since a fist is where a hand rests.
What the lab found
The folk wisdom got scientific backing in 2014, when researchers at Zhejiang University in China had 360 students play three hundred rounds each and studied the logs. Two patterns dominated. Winners repeated: a player whose throw just won tended to throw it again. Losers rotated: a player whose throw just lost tended to shift, and the shifts ran in a loop, rock to paper, paper to scissors, scissors back to rock. That hands you a working recipe against anyone who drifts into those habits. If they just lost with rock, expect paper next, so throw scissors. If they just won with scissors, expect scissors again, so throw rock. The researchers called the pattern a conditional response, and it was strong enough that a player exploiting it would beat a random one comfortably over time. None of it is guaranteed. But you only need a small lean in your favour, repeated across many rounds, to look like a mind reader.
The auction settled by scissors
In 2005 the president of the Japanese electronics firm Maspro Denkoh had to choose between Christie's and Sotheby's to auction the company's art collection, which included paintings by Cezanne, Picasso and van Gogh. He could not decide, so he made the two auction houses play a single round of rock paper scissors for it. Sotheby's treated the whole thing as chance and picked paper. Christie's asked the eleven-year-old twin daughters of an employee, who played the game daily at school, and the girls reasoned that everyone expects rock, so the safe throw is scissors: it beats the paper your opponent plays to counter the expected rock. Christie's threw scissors, Sotheby's threw paper, and the fee on a multimillion sale changed hands on a playground read. It remains the best argument ever made that this game is not a coin flip.
An ancient game of three
The three-way standoff is old. It descends from hand games played in China as far back as the Han dynasty and later spread through Japan as janken, the near-universal way to settle who goes first or who takes out the rubbish. Japan's older version, mushi-ken, ran the same three-way loop with animals instead of tools: the frog beats the slug, the slug beats the snake, and the snake beats the frog. The props changed over the centuries; the loop never did. It only reached the West widely in the early twentieth century, which makes it a newcomer here by comparison. Its genius is the perfect loop: rock crushes scissors, scissors cut paper, paper covers rock, and no single throw is ever safe. That balance is why it survives as a decision-maker to this day, and why, against an opponent with patterns, reading beats luck.
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Rock Paper Scissors: frequently asked questions
Does the computer cheat?
No. It picks fairly, so a long streak is genuinely down to luck and reading patterns.
What is my best?
The longest run of consecutive round wins you’ve managed.
Is Rock Paper Scissors just luck?
Against a truly random opponent, more or less. But real players and many computer opponents fall into patterns (favouring rock, avoiding three repeats, switching after a loss), and spotting those turns it into a game of reading rather than pure chance.
What is win-stay, lose-shift?
A common human tendency: after winning a round, people often repeat the throw that worked, and after losing, they tend to switch, frequently to whatever would have beaten them last time. Anticipating it lets you counter the next move.
What move should I open with?
There is no guaranteed best, but be aware that many players open with rock, so paper is a reasonable first throw. The bigger point is not to lock into any habit yourself, since a predictable opening can be punished.
What did the big study of real players find?
A 2014 Chinese study of 360 players found that winners tend to repeat their winning throw, while losers shift in a cycle from rock to paper to scissors. Track your opponent's last result and you can often predict the next throw a beat early.
Has rock paper scissors ever decided anything serious?
Famously, yes. In 2005 a Japanese company had Christie's and Sotheby's play one round for the right to auction an art collection worth millions. Christie's, advised by an employee's eleven-year-old twins to expect paper, threw scissors and won the sale.
How do I build a long streak?
Win rounds back to back by reading the opponent's pattern and countering it, while keeping your own throws varied. A single loss resets the streak, so consistency matters more than any one clever call.
Is Rock Paper Scissors free to play?
Yes. Rock Paper Scissors is completely free on Inkplay, with no download, no sign-up, and no in-game purchases. Open the page and play instantly on desktop or mobile.
Can I play Rock Paper Scissors unblocked?
Yes. Rock Paper Scissors runs entirely in your browser with no download, install, or plugins, so it loads instantly and keeps working even on school or work networks where bigger game sites get blocked.
More games to play
In the mood for more? Try Reflex, Simon, Aim Trainer, Stacker, or browse all skill games and the full games list on Inkplay. Rock Paper Scissors also appears in Quick Games.