Rock-paper-scissors isn't all luck. Turns out it involves a lot of skill, and science can explain a winning strategy.

A bunch of Chinese researchers recently took 360 students and broke them into six groups and had them play 300 rounds of the game. The winners of each round were given a small sum of money as a reward, so the incentive for winning was there.

Scientists found that if a player wins over their opponent in one play, her probability of repeating the same actions in the next play is higher than her probabilities of shifting actions.

But if a player loses two or more times in a row, he or she will not play the same sign, but will play whichever sign would have beaten the first one that allowed their opponent to win.

## If you won the last round...

...by playing rock, play scissors next.
...by playing scissors, play paper next.
...by playing paper, play rock next.

## If you lost the last round

...by playing rock, play scissors next
...by playing scissors, play paper next.
...by playing paper, play rock next.

## If you lost the last round

...by playing rock, play paper next.
...by playing scissors, play rock next.
...by playing paper, play scissors next.