Official tournament Rock Paper Scissors adds four things to the playground game: a fixed count so both hands land at the same moment, penalties for throwing early or late, a strict definition of the three legal hand shapes, and a match format (usually best of three) with a referee whose call is final. Everything else, including rock beats scissors, scissors beats paper and paper beats rock, stays the same.
This article is about those tournament regulations and the edge cases they exist to settle. If you just want the basic game, our rules page and how to play guide cover it. Here I want to explain why each regulation exists and where the idea of "official rules" came from in the first place.
Is there one official rulebook?
No, and anyone who tells you otherwise is overselling. Rock Paper Scissors has no international federation and is not recognised by any Olympic or sports body.
Two organisations did run serious championships in the 2000s. The World RPS Society, based in Toronto, held international championships from 2002 until 2009 and published its own rules, and its leaders Douglas and Graham Walker wrote The Official Rock Paper Scissors Strategy Guide (2004). The USA Rock Paper Scissors League held championships in Las Vegas from 2006 to 2008. Both are now defunct. Their events proved that a hand game could be refereed, but their rulebooks no longer govern anyone.
Today, "official rules" means the rules a particular organiser publishes and enforces for their event. At WRPSA we publish ours openly, and the rest of this article describes how they work and why.
The count: why timing is the whole game
In a casual game, people throw on different beats, and the slower player gets a tiny look at the faster player's hand. Almost every dispute in real matches comes from this.
So the first rule of any tournament is a fixed cadence. Under the WRPSA ruleset, the referee (or both players by agreement) calls "Rock, Paper, Scissors, Shoot". Players keep a closed fist during the count and reveal their final shape on "Shoot", not before and not after.
That creates two timing fouls:
| Foul | What it means | WRPSA penalty, first offense | Repeat offense |
|---|---|---|---|
| False start | Opening your hand before "Shoot" | Warning and replay | Loss of the round |
| Late throw | Delaying your reveal to react to the opponent | Loss of the round | Forfeit of the match |
The late throw is punished harder because it is the only foul that can actually steal a round. A false start mostly hurts the person who commits it, since it shows their hand early.
Legal shapes: ending the "was that paper?" argument
A throw only counts if the referee can read it instantly. Our rules define:
- Rock: a closed fist.
- Paper: a flat open hand, palm facing down, held horizontally. A vertical hand, like a handshake, is not paper.
- Scissors: index and middle fingers extended in a clear V.
One hand only, fully visible, no gloves, props or devices. Anything ambiguous, and any novelty throw such as lizard, Spock or "dynamite", is an illegal throw and loses the round. Repeat it and you forfeit the match. The opponent may choose to allow a replay, which keeps friendly events friendly.
Why so strict about paper? Because a half-open hand can be argued as rock or paper after the fact. Fixing the orientation removes the argument before it starts.
Ties
A tie is replayed immediately, with no limit. There is no rule that awards anything for a tie, and no cap after which a coin toss decides. This matters in long matches: players who tie repeatedly are often mirroring each other, and the next throw is where reading the opponent matters most.
Match formats
| Format | How it is won | Typical use |
|---|---|---|
| Best of 3 | First to 2 round wins | Standard match |
| Best of 5 or longer (odd numbers) | First to a majority | Later rounds and finals |
| Single or double elimination | Lose one (or two) matches and you are out | Most brackets |
| Swiss or group stage | Fixed number of matches, ranked by record | Larger fields |
The match ends the moment one player reaches the majority; you do not play out the remaining rounds. Organisers must announce the format and the tie-break method (for example head-to-head result, or extra throws) before the event starts, not during it. For help picking a format, see our tournament guide, and for scoring details see how to keep score.
Conduct and stalling
Matches should move. Stalling, such as delaying between rounds to break an opponent's rhythm, earns a warning and then a round loss. Unsportsmanlike conduct (excessive trash talk, intimidation, physical contact) earns a warning and then disqualification, and anything like cheating or aggression can lead straight to forfeit.
Disputes and appeals
The referee's call during play is final. After a match, a player may file a protest immediately, with evidence such as video, witnesses or match logs. Only a clear breach of a written rule overturns a result. "I think they were a bit late" without evidence is not enough, which is exactly why a clear count matters so much.
Edge cases people actually ask about
- Both players false start. Replay the round. Neither gained information that the other did not.
- A player changes shape after "Shoot". That is a late throw. The shape shown on "Shoot" is the throw.
- No referee. Players can agree to call the count together. If they cannot agree on a result, the round is replayed.
- Online play. Timing fouls disappear because both choices are locked in before either is shown. That is one reason to play online when you want a result nobody can argue about.
How the rules evolved
The playground game had one rule set: the three beats. The count arrived with jan-ken in Japan, where a spoken chant keeps both players in time. Timing fouls, shape definitions, formats and referees came with organised competition in the 2000s, when prize money made small disputes matter. Our current rules are the same kind of document: written for events where people care about the result, and designed so the only thing that decides a match is the choice each player makes.
FAQ
What are the official rules of Rock Paper Scissors?
There is no single global rulebook. Tournament rules, like ours, add a fixed count, timing fouls, strict hand shapes and a best-of format to the basic game.
Is throwing late cheating?
Yes, in any refereed match. Under our rules it costs you the round the first time and the match the second.
Is Rock Paper Scissors an Olympic sport?
No. It has never been part of the Olympic programme, and there is no recognised international federation.