What it does
A position has at most 218 legal moves and a Choice takes up to 255 options, which is what makes the guarantee hold. The panel shows the three moves Jev weighed and their probabilities.
Apps & data pipelines
AI chess battle
Play chess against Jev in the browser with Stockfish analysing locally; each turn is one Choice over the legal moves, so an illegal answer is impossible.
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How you can use it
A developer can study this project to learn how to strictly limit AI choices. The app sends an outside AI service called Jev every legal chess move for a turn. Chess has at most 218 possible moves. These easily fit inside the 255 allowed choices, guaranteeing the AI never makes an illegal play.
A standard chess program runs inside the web browser to grade strategy. It evaluates every turn to see if a legal move was actually a poor strategic choice. Connecting the AI requires an API key. This is a unique code generated by a service to link the software to it.