A game of chess.
Play Jev, TypeSafe AI’s System One model, a simple engine or a friend, or watch Jev play itself. Each turn Jev weighs every legal move at once, as one typed Choice, and shows how sure it is. Chess960 shuffles the back rank into one of 960 starting positions.
Piece sets by Armando H. Marroquín, Utrecht by Hans L. Bodlaender, from Eric Bentzen’s En Passant collection (more on the fonts); Arcade and Console by SpicyGame (CC0). Rules by chessops, by Niklas Fiekas, the library behind Lichess, licensed under the GPL-3.0, and so is this experiment’s source. Jev is TypeSafe AI’s System One model, called through Vercel’s AI Gateway. The coach is Stockfish, as stockfish.js (GPL-3.0), loaded only when the coach is on.