Connect your games
Import recent Chess.com or Lichess games instead of searching for positions by hand.
blunder.zone
by chess lovers, for chess lovers
Personal chess training
Stop solving random puzzles. Train the mistakes you actually make.
Connect Chess.com or Lichess. Blunderzone finds the critical moments in your games and turns them into a training loop you can repeat until the pattern sticks.
Start free on the web Download on the App Store Get it on Google Play
Free training is available. Basic and Premium are optional and managed in the native apps.
A useful loop, not a puzzle feed
From blunder to better pattern recognition
Find critical moments
Review missed ideas in the context of the openings, opponents, and time controls you actually play.
Train them again
Use game tactics, quick sessions, and spaced repetition to revisit patterns before they fade.
Why it is different
Your games decide what comes next
- Positions match your openings and playing habits.
- Every tactic links back to a real game and decision.
- Progress and recurring patterns stay visible.
Make your next mistake useful
Start in the browser now, or continue on iPhone, iPad, and Android.