If you play rock paper scissors against a mirror, every single round is a tie. Your reflection throws exactly what you throw, at exactly the same moment, so nobody can ever win.
That sounds like the end of the story, but the reasons behind it are a neat little lesson in how the game works, and the question "can you beat yourself?" has a more interesting answer than you might expect.
Why a mirror always ties
A mirror reverses left and right, but it does not change the shape of a hand. A fist is still a fist, a flat hand is still a flat hand, and a V is still a V. So when you throw rock, the reflection throws rock. Rock against rock is a tie, and the same goes for paper and scissors.
Timing does not help either. The reflection moves at the speed of light, so there is no late throw to exploit and no early throw to read. It is the one opponent guaranteed never to break the rules.
In game terms, rock paper scissors only produces a winner when the two throws are different. A mirror makes the throws identical by definition, so the only possible result is a draw, forever.
What about using both hands?
This is the version people actually try: left hand against right hand, both yours.
The honest answer is that you are not really playing a game, you are choosing a result. Your brain decides both hands, so whichever hand you want to win will win. People who try it tend to notice one of three things:
- Both hands copy each other. Hands like to do the same thing at the same time, so many people end up throwing the same shape with both, which is a tie.
- One hand "cheats." The dominant hand often waits a fraction of a second and wins.
- It feels random but is not. You can make it feel unpredictable, but you always know both answers before the reveal.
It is a fun coordination exercise, and a good way to practise forming the shapes quickly and cleanly. It is not a way to find out who wins.
Can you beat yourself in a real sense?
Yes, in one useful way: you can play against your own habits.
Everyone has patterns. On wrpsa.com, across 3,020 throws from 943 players between 29 July and 27 September 2026 (mostly games against the computer), rock was the most common opening throw at 38.1%, and after a win players repeated the same throw only 20.0% of the time. That is one site's data over two months, so it describes our players rather than all humans, but it shows that habits are real and measurable.
A good solo exercise is to write down 30 throws as randomly as you can, then look at them. Most people find they avoided repeats, favoured one throw, or fell into short cycles. Those are the habits an opponent would exploit. Our psychology page explains why people struggle to be random.
Better ways to practise alone
If you want an opponent that can actually beat you:
- Play the computer. You can play online for free. The computer's throw is locked in before you choose, so it cannot copy you the way a mirror does.
- Use a random source. Roll a die (1-2 rock, 3-4 paper, 5-6 scissors) and play against the result.
- Drill the shapes in the mirror. This is what a mirror is actually good for. Check that your paper is flat, your scissors are a clear V and your rock is a tight fist, so nobody can argue with your hand in a real game. Our how to play guide shows the correct shapes.
FAQ
Who wins rock paper scissors against a mirror?
Nobody. It is always a tie, because the reflection throws the same shape at the same time.
Can you play rock paper scissors by yourself?
You can play against a computer, a die or an app. Playing hand against hand is really just choosing the winner yourself.
Is a mirror useful for anything in rock paper scissors?
Yes: checking that your hand shapes are clean and quick.