What it does
The site lends its own keys under a daily cap, and voice mode handles a loose spoken move by asking Jev to pick the legal move the words name.
Apps & data pipelines
Jev Chess
Jev plays chess against Stockfish, against any OpenRouter model, or against you, with the moves it weighed drawn as arrows and their probabilities beside them.
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How you can use it
Sketch out how you want to show your game board and highlight possible moves on screen. Your developer can build code that checks which moves are legal and asks the model to rate only those valid choices. This prevents illegal turns and lets you show arrows with percentage odds for every option considered.
You can also use this setup to handle messy spoken commands from players. When someone says an informal move like putting a piece on a square, the program matches those words against the allowed choices. Keep in mind that voice features rely on browser speech tools, which send audio away to turn speech into text.