✊ Rock Paper Scissors Simulator
Pick your move — the computer picks randomly at the same moment.
Every move you can make is equally good
The computer draws one of the three moves uniformly from your browser's cryptographic random source, and it never looks at what you clicked. Against an opponent throwing evenly at random, all three of your options give exactly the same outcome:
P(you win) = P(you lose) = P(tie) = 1/3, whichever you pickThat is the whole game theory of rock paper scissors in one line: throwing each move a third of the time is unexploitable, so nothing can be played against it. Over 30 rounds expect about 10 wins, give or take 2.6 - a 13-10-7 record is unremarkable rather than a hot hand. Five wins in a row happens 0.41% of the time.
What would actually help against a person
Humans cannot throw randomly, and that is where the real strategy lives:
- Scissors is thrown least. Observed play skews towards rock, with scissors around 30% of throws, so paper is a marginally better opening against a stranger.
- Win-stay, lose-shift. Players tend to repeat a winning move and change after a loss, so someone who just lost with rock will often move to paper or scissors next.
- Announcing beats guessing. Telling an opponent what you will throw and then throwing it works surprisingly often, because they assume a bluff.
Frequently asked questions
Does the computer see my move before it picks?
No. The draw happens after your click but ignores what you chose entirely, so it cannot counter you. It also cannot learn from earlier rounds.
What is the best move in rock paper scissors?
Against a random opponent there is no best move - all three win a third of the time. Against a person, paper is the slightly better first throw, because rock is the most over-used opening.
How do I reset the score?
Reload the page. The running tally of wins, losses and ties lives only in the open tab and starts from zero every visit.