Checkmate More
Turn Chess.com games into clearer coaching — without uploading your life to a server.
Stockfish runs on your machine. You get move labels, accuracy, openings, famous-game theory, and habits you can actually train.
What we do
Game review that talks like a coach, not a spreadsheet.
Paste a Chess.com username. We pull your recent games, run an engine pass in the browser, and build a profile of how you actually play — not a generic tip dump.
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Move quality you can trust the shape of
Expected-points labels aligned with modern review (Best → Blunder), plus our Book / Theory split so openings and famous games stay distinct.
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Form across many games
Accuracy trends, Game ELO estimates, phase CPL, punish rates, piece habits, and heatmaps — so one blunder doesn’t define the story.
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Coaching with receipts
Theme tags, material events, and clickable evidence moves. Learn openings and theory lines from the same catalog we use to classify your games.
How we do it
Local Stockfish. Your data stays with you.
Lite is fully client-side: Chess.com’s public API for games, Stockfish in a web worker for analysis, and localStorage for your cache. Depth presets from Lite Rapid to IM & GM let you trade speed for sharpness.
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Parallel game scans
Multiple engine workers chew through new games while already-analyzed ones load from cache at the depth you chose.
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Critical moments, not noise
On deeper presets we re-search sharp swings; Familiar stays closer to what other online engines feel like day to day.
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Privacy by architecture
No Checkmate More account for Lite. Analysis never leaves your browser session’s machine.
Lite & Pro
Start free. Pro is on the way.
Lite — available now
Full local engine review for your Chess.com games: presets, coaching, openings, theory, and stats. No signup. Perfect for grinding your own games tonight.
Pro — coming soon
Cloud history, automatic sync, play modes, and cross-platform sources — so coaching can see months of patterns, not just what fits in localStorage.
Pro roadmap
Where Checkmate More is headed.
Pro unlocks the long game: unlimited history, always-fresh stats, and ways to play that train the same habits we measure.
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Cloud game storage
Unlimited analyzed games so the coach can show patterns you’ve fixed — and ones you’ve slipped on — over time.
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Automatic data sync
Our backend polls your Chess.com profile and scans new games for you, so stats update without waiting on local engines.
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Cross-platform compatibility
More than Chess.com — Lichess & Duolingo integrations, plus onboard games with data import and API push.
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Play mode
Bot levels that play differently each game, with customisable human “traits” so practice feels less scripted.
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Multiplayer
Play vs friends or in ranked for ELO — keep competing while you keep learning.
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Beat yourself mode
Train against a bot built from your scanned games — see how opponents experience your style by beating yourself.
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Variant game modes
Bots and online play in custom variants with different pieces and rules.
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Android & iOS apps
Take Checkmate More with you — review and play on the go.