Stockfish 18 in your browser
Run deep analysis locally with no cloud queue and no session caps. Choose the depth preset that fits your device and study pace.
Features
Everything in Chessomy is designed for one goal: make serious analysis and training available without paywalls, account friction, or black-box scoring.
Analysis
Clear move feedback
Every move is labeled with transparent classifications and accuracy scoring so you can see exactly where a game changed.
Fast import flow
Pull games from Chess.com or Lichess, or paste PGN directly. Review one game or many without changing tools.
Training
Blunder puzzles from your own games
Turn your biggest mistakes into practical training positions. You train the exact patterns that are costing you points.
Improve from real decisions
Use engine lines and move context to understand why a move failed, then practice the correction immediately.
Privacy & local-first
No account required
Open Chessomy and start analyzing. No sign-up flow, no login wall, no subscription gate to unlock core features.
No server-side game storage
Games and analysis stay on your device. The default model is simple: your study data is yours.
Offline-first PWA
Install once and keep working when your connection drops. Useful for travel, commutes, and focused study sessions.
Study & exploration
Analysis board for what-if lines
Explore candidate moves, engine continuations, and position ideas without leaving your review workflow.
Saved archive and trends
Track your analyzed games and revisit patterns over time to see whether your decision quality is actually improving.
Variants
Chess960 and Casablanca Chess
Analyze variant games with the same local engine pipeline used for standard chess, including import and review support.
Want the scoring details, formulas, and classification logic?
Read Analysis Transparency