Rock Paper Neural is a free browser rock-paper-scissors duel against a small multilayer perceptron that trains on your move history. After a few rounds it tries to predict your next pick. About ~20 KB after Play, no install, no account.
Want a cannon duel vs a neural net instead? Try Bangbang Artillery. Want an optimal-stopping puzzle? Try Googol Stopping Game.
Pick Rock, Paper, or Scissors. A tiny neural net watches your sequence and tries to beat your next move. Keyboard: J / K / L. Adapted from Victor Ribeiro's jokenpo (MIT). About ~20 KB.
Works with click/tap or keyboard. Session-only - no save data.
Welcome to Rock Paper Neural - a free browser rock-paper-scissors duel against a learning neural net, with no account or install. After a few rounds the model tries to predict your next pick from your recent history, so repeating the same pattern gets you countered. About ~20 KB after Play, session-only with no localStorage, adapted from Victor Ribeiro's MIT jokenpo. Use cases: a quiet break, noticing your own tells, or comparing tiny client-side AI toys. Privacy note: scores and training stay in this tab only until you refresh. For more free browser games, open the games hub. Related neural-net toys on this site include Bangbang Artillery and the decision puzzle Googol Stopping Game.
Frequently Asked Questions
What is Rock Paper Neural?
A free browser rock-paper-scissors game where a small neural network trains on your move history and tries to beat your next choice.
How do I play?
Click or tap Rock, Paper, or Scissors. On a keyboard press J for Rock, K for Paper, L for Scissors. Scores for player, computer, and ties update each round.
When does the AI start learning?
The first few rounds are mostly random. After enough history, the net predicts your next move and picks the counter. It only trains when it did not win the previous round.
Does it save my history?
No. Training is session-only in memory. Refresh clears the model and scores.
How big is the download?
About ~20 KB of HTML, JavaScript, CSS, and a small sprite sheet after you press Play.
Is this open source?
Yes. Adapted from jokenpo by Victor Ribeiro under the MIT license. This site build strips the service worker and demo GIF, adds noindex, and ships LICENSE plus CREDITS next to the engine.