ChessMind

Offline-first Android chess position solver and training companion

ChessMind is a private, offline-first Android chess solver and trainer. Capture or import a board photo, build or correct the position, choose an analysis level, and get a best move with a readable explanation—without an account or server.

What works Expressive sky-blue Material 3 interface with a complete dark theme and focused Home–History dock Bundled Space Grotesk and JetBrains Mono typography Original transparent ChessMind illustrations used across onboarding, scan, setup, practice, history, analysis, settings, profile, and results, including a dedicated Set Position scene Full illustrated launch experience sourced from public/splash.png and adaptive launcher artwork from public/logo.png Four board palettes and five crisp filled piece sets (rhosgfx, fantasy, spatial, celtic, and Chessnut) with no synthetic outlines or piece shadows Short first-run onboarding and edge-to-edge phone layout CameraX scanner overlay plus gallery import and image rotation/review Manual board editor with tap-to-move, piece palette, long-press removal, flip, undo/redo, side-to-move, castling, and en-passant controls Strict FEN validation/import/export and common PGN import Complete legal move generation, including check filtering, castling, en passant, and promotion Four analysis presets: Beginner, Intermediate, Master, and God mode Adaptive offline AI opponents with Gentle, Adaptive, and Tough strength profiles, configurable pace, and varied openings Local pass-and-play friend matches with legal move enforcement and optional automatic board flipping 3, 5, and 10-minute clocks plus an unlimited mode for both AI and friend matches Clocks begin only after White's first move; both match modes support draw agreements, with position-aware AI draw decisions Iron, Silver, Gold, Platinum, Diamond, Master, and Grandmaster leagues Persistent points, games, wins, and draws stored only on device, with per-match point changes and league progress shown after every AI game Full-game review for both sides with best-move comparisons, visible progress, per-position time limits, and a guaranteed quick-review fallback Packaged Stockfish 19 UCI analysis on ARM devices, with a cancellable built-in engine fallback MultiPV candidate moves, evaluation, depth, principal variation, and human-readable reasons Interactive analysis board with previous/next line controls, free legal play, reset, and re-analysis Local analysis history plus JSON backup/restore Local player profile with editable name and profile photo Expressive grouped settings for appearance, drag-to-move controls, match clocks, AI behavior, coordinates, legal hints, haptics, and contrast No account, analytics SDK, cloud engine, or image upload

License

Apache-2.0