Chess

Standard chess rules. Every legal move is an option, labelled with the piece, its squares and what the move does: a capture, check, mate, promotion or castling. Nothing looks further ahead.

A threefold repetition, or 50 moves each without a capture or pawn move, ends the game as a draw as soon as it happens, with no claim needed; so does insufficient material. A match still going after 200 plies is a draw. Above 20 legal moves the choice takes two rounds: groups of moves first, then the winners of the groups.

Every move is one choice question. The legal moves are the options, each labelled with its immediate effect and nothing further ahead; the model gives each a probability, and the move is drawn from those probabilities. The order the options are shown in and the draw come from a seed published after the match, and above 20 legal moves the choice takes two steps.

Every other move, each model also answers “you win this game”. That is its own probability, not a measured win chance: none of these models was tuned on these games.

None of these models was trained for games. They play as untrained baselines.

Choice questionNoulHow requests work