Checkmate Mind is a small, private toolkit: analyze positions with coaching text and a local Stockfish engine, work through leveled puzzles with video picks, and study patterns across your own saved games. No account — data stays on your device.
Drag pieces on a full board, then use Explain move for quick pattern hints
(checks, development, hanging pieces). Optional Stockfish 16 (WASM) suggests
engine lines when you run the site over http://. Export games as PGN.
Ten rating bands from ~200 to ~2000, two puzzles each: on-board tactics with Check my move, some multi-solution and multiple-choice ideas, plus a curated video gallery beside the trainer.
Go to Learn →Import PGN files or paste games, tag your color, and scan your library for recurring habits and loss patterns — heuristic summaries, not cloud analysis.
Open library →Optional Gemini vision (your API key) or offline board readers, notes or dictate, then compare your move to Stockfish with a short coach readout.
Open scanner →Checkmate Mind is not a playing server. For games, puzzles, and lessons at scale, these are great companions (external sites — we are not affiliated).
Stockfish needs a local server — use Open Checkmate Mind.command (Mac),
start-server.bat (Windows), or ./serve.sh, then open
http://127.0.0.1:8765/. Opening HTML files directly will not run the engine.