How to Host a Rock Paper Scissors Tournament

To host a Rock Paper Scissors tournament, pick a single-elimination bracket, play every match best of three, write the throw rules down before anyone arrives, and put one referee on every table. That is the whole core. The rest of this guide is the detail that keeps a room of excited people from arguing about whether someone threw late.

I've kept this as a checklist you can work through in order. If you'd rather not build brackets by hand, our free event hosting tool does the pairing and results for you.

Step 1: Decide size and format

Your player count decides almost everything else.

Single elimination is the default because it is quick and easy to follow. Its weakness is that one bad match sends someone home. If people are travelling or paying to enter, give them more games: use pools first, or a double-elimination bracket so everyone must lose twice.

If your count is not a power of two (8, 16, 32, 64), give the extra spots as first-round byes, usually to whoever registered first or at random. Decide which in advance and say so.

Step 2: Write the match rules

Most arguments at an RPS event come from rules nobody agreed on. Print these and read them out at the start:

1. The count. Pick one prime and stick to it. The common one is "rock, paper, scissors, shoot", throwing on "shoot". Some groups throw on the third beat instead. Either is fine; mixing them is not.
2. Legal throws. Rock is a closed fist. Paper is a flat hand, palm down or sideways. Scissors is the index and middle fingers extended and separated. Anything else is an illegal throw.
3. Late throws. A throw that changes shape after the "shoot" beat is a late throw. The first time, the referee replays the throw. A second time in the same match, the player loses that throw.
4. Ties. A tie is replayed and does not count toward the match.
5. Match length. Best of three throws per game and best of three games per match is the fuller format; plain best of three throws works for casual events. Choose one.
6. Referee decisions are final. A disputed throw is replayed, never argued.

Our rules page covers the legal throw shapes in more detail and is fine to print for the tables.

Step 3: Recruit referees

One referee per active table. For 32 players that is 16 tables in round one but only 8 by round two, so you can release people as the bracket shrinks. A referee's job is simple: call the count, watch both hands, announce the winner of each throw, and report the match result.

Brief them for five minutes before doors open. The two things they need to agree on are what counts as a late throw and what to do when a hand is ambiguous (replay it).

Step 4: Set up the room

• Tables or marked spots for each match, numbered to match the bracket.
• A visible bracket. A large printout or a screen. People want to see who they play next.
• A results desk where referees report scores. One person owns the bracket; nobody else edits it.
• A stage or open floor for the final, so the room can watch. The final is the part everyone remembers.
• A microphone if you have more than about 40 people.

Step 5: Registration and seeding

Take names in advance so you can build the bracket before the day, then leave room for walk-ups. Seeding in RPS rarely matters because there is no reliable ranking, so random seeding is the honest choice. Draw it publicly or let software do it.

Ask players to check in 15 minutes before start. Anyone not checked in when the bracket locks is replaced by a walk-up or becomes a bye.

Step 6: Prizes, if any

You do not need prizes, but a trophy or medal for the winner makes the final feel real. Keep it cheap and fun: a painted rock, a novelty trophy, a gift card from a local sponsor. If you charge an entry fee and pay cash prizes, check your local rules on games of chance and skill first; they vary by place, and I can't advise on them for you.

Step 7: Run the day

Here is a timeline for a 32-player evening:

Add a buffer. Matches run longer than you expect because ties are replayed.

Making it more interesting

• Themed brackets. Name rounds after famous matches, such as the 2005 Christie's and Sotheby's auction decision. See famous moments for others.
• A variant side event. Run a Lizard Spock bracket for people eliminated early. Rules are on our variations page.
• A practice corner. A laptop or phone where people can play against the computer while they wait.
• Fundraising. RPS works well as a low-cost charity event. I've written a separate guide on using RPS for fundraisers and team events.

Printable day-of checklist

• Bracket printed and posted (plus a spare)
• Rules sheet on every table
• Referees briefed and assigned to table numbers
• Results sheet or tool ready at the desk
• Microphone tested
• Prizes on the stage table
• Tie-break and late-throw rules agreed
• Plan for no-shows and walk-ups

For a broader overview of formats and competitive play, see the tournament guide.

FAQ

How long does an RPS tournament take?

About 10 minutes per round for best-of-three matches, including setup between rounds. A 32-player bracket has five rounds, so plan roughly an hour.

How many referees do I need?

One per match in progress. The first round is the busiest; after that you need half as many each round.

What happens if both players keep tying?

Keep replaying. Ties do not count. If a match drags on, it is almost always because the players are mirroring each other, and it resolves quickly.

Is there an official set of tournament rules?

No single governing body sets binding rules today. Write your own sheet, publish it before the event, and apply it consistently.