Chess Analyzer 24/7 vs Chess Lab

Free chess board analyzer with AI-powered Stockfish engine. Snap a photo of any chess board and get instant move suggestions, latest chess news and more.

Open the app and your previous channel is right there. Watch world-class games in your spare time. Save interesting matches and analyze the positions. Chess Lab: Arasan Engine is a chess app that combines a world-class chess engine and Lichess spectating into one beautiful, intuitive interface. ▪ Play instantly with "Web Invite" - No download or account creation required for your opponent. - Just send an invite link, and they can join immediately from their smartphone or PC browser. ▪ Diverse game modes - Web Invite Match: Easy private matches via URL. - Offline CPU Match: Play against the powerful Arasan engine (featuring the latest v26.1 / NNUE v8). Practice with 30 levels of adjustable strength. - Local 2-Player Match: Play face-to-face on a single device. ▪ Watch world chess on your smartphone. Lichess Spectating - Watch top world games right in the app, just like watching TV or manga on your phone. - Channel selection (Top Rated / Bullet / Blitz / Rapid / Classical), thumbnail/list display, and item count (10/20/30) support. - Displays board, moves, clock, playback controls, and termination reason. Rewind moves to review. - Your previous tab and channel open automatically, putting world games right in front of you during spare moments. - Save interesting games to history to use for your own learning. ▪ Extensive analysis & replay features - Powered by Arasan: Built-in UCI engine that calculates highly accurate evaluations and best moves. - Real-time Analysis: Displays evaluation bar and eval graph in real-time during games. Recalculate past games with "Analyze Position" and save the graph. The graph uses a dynamic scale that excludes mate scores and clamps at a maximum of ±15 pawns. - Candidate Moves Display: Shows top candidate moves on the board with arrows, ghost pieces, and evaluation labels. The 1st move is blue, and subsequent moves are color-coded green → yellow → red based on Loss (difference from the 1st move). Toggle visibility with the "Candidates" button. - Interactive History: Step playback, fast-forward, jump to any position, and a "Rewind" (back to start) button for efficient review. - Visualized Insights: Automatically highlights large evaluation changes (blunders). Color-codes long-thinking moves (red/yellow) to visualize time management. - PGN Import: Import external game data (PGN). ▪ Premium board experience - 2.5D & 2D Display: Switch between a tilted 2.5D perspective and a classic 2D board. - Piece Design Toggle: Choose between text pieces and detailed image pieces. - Full Promotion Support: Accurately select Queen, Rook, Bishop, or Knight when promoting a pawn. - Pause & Resume: Automatically saves unfinished games so you can resume later. ▪ Improved menu & settings - Redesigned bottom menu into a 3-tab layout: "Match / History / Lichess". The header switches according to the selected tab. - Tab selection state is saved, so the previous tab opens automatically on the next launch.