About Chessyi

Chessyi is a browser-based chess analysis and training platform for players who want more than a board, Stockfish engine analysis, opening drills, visual heatmaps, and one of the largest integrated game libraries available on the web.

Our mission

Help every chess player, from enthusiastic beginners to dedicated improvers, study smarter with pro-grade tools that run instantly in the browser, without expensive subscriptions or desktop installs.

What we built

• Local Stockfish analysis running locally on your device
• 70+ opening practice lines with move validation
• 1,917,619 games across 308 collections
• 12+ heatmap overlays and piece-level visual analysis
• Play vs adjustable computer, local two-player, and full PGN workflow
• Cloud saves with privacy-first architecture

Privacy-first analysis

Your engine runs on your machine. We do not send live analysis positions to a remote server farm. Only games and positions you explicitly save sync to your account.