Rock Paper Scissors

While each round has random elements, human players exhibit predictable patterns. Studies show people tend to repeat winning moves and shift away from losing ones. The Hard difficulty exploits these tendencies. Against a truly random opponent, no strategy can improve beyond 33% win rate. Against humans, observing patterns and exploiting psychological biases can provide edges of 10-20%.

The algorithm tracks transition frequencies—what you tend to play after each possible previous move. With sufficient history (3+ rounds), it predicts your most likely next move based on your current streak behavior and counters accordingly. This mimics how expert human players read opponents.

Currently this is a single-player versus computer implementation. For two-player mode, both players can agree on moves privately and reveal simultaneously, using the tool to record results manually.

Impossible mode serves two purposes: demonstrating the game's deterministic logic for educational purposes, and providing a humorous "rage quit" difficulty where the computer always wins. It reveals the underlying counter-move system transparently.

Yes. All data stores locally in your browser using localStorage. No data transmits to any server. Clearing browser data or using private/incognito mode prevents persistence.

• Easy: Exploit predictable AI mistakes by occasionally repeating winning moves
• Normal: No optimal strategy exists; all moves have equal expected value
• Hard: Use true randomization or deliberately break patterns to prevent prediction
• Impossible: No winning strategy exists; every move loses by design

Yes. Click the Export button to copy a formatted text summary including all statistics and round-by-round results to your clipboard. This works for sharing, analysis, or personal record-keeping.

The current implementation preserves streaks through ties, counting only losses as streak terminators. This follows common competitive rule sets where ties are neutral outcomes. Your best streak and current streak reflect consecutive wins without intervening losses.