Rock Paper Scissors
Play a one-person rock-paper-scissors game against a randomly selected computer hand. Each result shows both hands, so you can check the rule and score yourself. Use it for a short game or to learn the three-way winning cycle without an account or installation.
Key features
- Choose a hand and explicitly start each round
- Browser crypto randomness with rejection sampling to remove modulo bias
- Separate win, loss, draw and total-round counters
- Last 30 rounds showing both player and computer hands
- Rule examples, keyboard controls and a complete score/history reset
How to use
- Select rock, paper or scissors for the next round.
- Press Play a round to compare against the computer.
- Read both hands, the outcome and the updated scores.
- Choose another hand or keep the same hand for the next round.
- Use New game to clear scores and history.
Use cases
- Learn which hand wins against each other hand
- Play a few quick rounds during a break
- Observe outcomes while repeating the same hand
- Check draw handling and scoring in recent history
Frequently asked questions
Does the computer choose a hand that beats mine?
No. When you start a round, a browser crypto random value selects the computer hand, then the rule compares the two hands. Results are not adjusted to force a win, loss or comeback.
Do the three hands have equal chances?
The selection discards the incomplete tail when dividing the random range into three choices. This gives each hand the same chance. A short history is not expected to contain identical counts of every hand or outcome.
Do draws count as rounds?
Yes. A draw adds one to the total and draw counters. It does not increase either the win or loss counter.
How many rounds are kept?
The table keeps the newest 30 rounds. Scores also include earlier rounds in the session. A game is limited to 10,000 rounds; start a new game after that limit.
Does changing my selected hand play another round?
No. The selection prepares your next round. Press Play a round to generate a new result. The last-round message continues to show the hand actually used in that round.
Can I play with a keyboard?
Use Tab to reach the hand choices and buttons, and arrow keys to change the radio selection. Activate buttons with Enter or Space. If secure randomness is unavailable, the tool reports an error instead of silently using a weaker fallback.
Privacy
Your chosen hand, scores and recent rounds stay in the current page’s browser memory. This tool does not submit game records to a server or analytics event, or automatically save them in browser storage. Resetting or leaving the page clears the session.
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