KnightSight

See the connections behind every chess position. KnightSight brings attacks, defenses and tactical ideas directly onto the board, with an offline engine to help you examine your choices.

Make tactics visible
Turn individual overlays on or off to see attacking lines, defended and undefended pieces, pins and unsafe king squares. Explore candidate moves and destination markings for tactics such as forks and skewers. Built-in explanations help you understand what each marking means.

Play with a coach
Play White or Black against the computer. Adjust the opponent's strength and the coach's thinking limits. Compare your move with engine recommendations and examine alternative continuations. You can ask the coach to review moves that fall outside its leading candidates.

Analyze your own positions
Paste a PGN game or a FEN position, step through the moves and explore with Stockfish 18 NNUE. Set up a custom position in the board editor, choose the side to move and manage castling rights. Save analyses and return to them in History.

Revisit your decisions
Review saved games on the board and inspect the calculations recorded during play: evaluations, move judgments, centipawn loss and candidate continuations. The calculation details also include available search depth and time information.

Practice what you missed
Build a personal puzzle library from mistakes in your games. Work through training batches, request a hint or reveal the answer, then retry and track your progress. Three starter positions are included to introduce puzzle training.

Offline by design
The complete Stockfish engine and its neural networks are included. Chess play and analysis work without an internet connection. Your games, puzzles and settings stay in local app storage; sharing a game or position is your choice.

No account, ads, subscriptions or in-app purchases. For Android phones and tablets. Choose from 99 language and regional options in Settings. Menus, explanations and messages are translated offline.

Support, privacy information and open-source credits are available through Settings > About KnightSight.