The technology behind BobbyChess.

DeepSquare develops chess and analysis technology. BobbyChess brings it to life: play for free, explore historic games and take your own games away as PGN. Fischer’s opening moves meet DeepSquare’s chess core—historical book moves are checked before play.

Open DeepSquare Back to BobbyChess

Destination: deepsquare.ai · Opens in a new tab only when you click. BobbyChess stays open.

Engine lab

Search architecture, analysis and controlled development—the technical foundation stays explainable.

Open historical data

Openings: Chess Database · Ana L. Schaigorodsky ↗, CC BY 4.0. Filtered and transformed into era books for BobbyChess.

More on DeepSquare

Discover more playing profiles, keep your games and explore them with the platform's analysis tools.