Blunder Zero : Chess Coach icon

Blunder Zero : Chess Coachv1.8.6

Released September 14, 2026Major

iOS

What changed

  • New featureAdded backup and restore functionality for games, reviews, and drill progress via file export/import.
  • PerformanceEnhanced analysis engine to review games at full strength regardless of opponent level.
  • UXImproved game review accuracy for checkmate recognition and move classifications.
  • PerformanceImplemented stability fixes for analysis and drills.

Original release notes

Backup and Restore. You can now save your games, reviews and drill progress to a file, then bring everything back on a new device or after reinstalling. Find it in Settings, under Backup & Restore.

Sharper analysis. Your games are always reviewed at full engine strength, so the coaching is as strong as the engine can make it, whatever opponent you played against.

Clearer game review. Checkmate is recognized as the best move it is, and move classifications line up with what you would expect from a strong engine.

Steadier sessions, with stability fixes across analysis and drills.

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by Blunder Zero : Chess Coach, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

Data licensed under CC-BY-NC 4.0