Free chess game analysis and personalized training built from your own games
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Stage
Startup
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Founded
2026
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Based in
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Pricing model
Freemium
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Pricing
Free plan includes game reviews (150 per day limit), puzzle practice, Blunder Preventer, one free session weekly of each premium trainer, 2 repertoires up to 10 lines each, and one scouting report monthly. Premium costs $2 per month, $12 every 6 months, or $20 per year, unlocking unlimited access to
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Key features
Move-by-move Stockfish analysis of Chess.com and Lichess games
Blunder Preventer trainer to spot tactical mistakes
Opening Improver with opening encyclopedia and repertoire trainer
Time Trainer for practicing under time pressure
Visualization module for calculating forcing lines
Resourcefulness training for difficult positions
Scouting report showing skill breakdown and training recommendations
Analysis board with Stockfish 19 running in browser
Daily chess puzzles
Git-based version control for bot projects
Support for Node 20 or later
Local match engine for testing
Unified revision history across edit methods
Agent access key authentication
Support for up to 32 commits per push
Multi-language support via toolchains
Immutable revision creation on push
What makes it different
Personalized training built specifically from patterns in your own games rather than generic material
Recurring mistake detection that turns common errors into focused training modules
Free game analysis without sign-up for casual users
Integration with Chess.com and Lichess accounts for automatic game import
Affordable premium pricing starting at $2 per month
Unified workflow combining browser, WebDAV, and Git editing methods
No administrator access required for installation
Durable operation handling for unreliable connections
Support for multiple concurrent editors with merge handling
ChessVox
Clunkyard