Chessis is a powerful chess analysis app designed to help players improve their game through in-depth insights, advanced engine analysis, and detailed reports. Combining features for beginners and advanced players alike, Chessis allows analysis of personal games, online matches, and board positions using one of the strongest chess engines available—Stockfish 18.
Game Analysis
Chessis analyzes games with the Stockfish engine, detecting blunders, mistakes, missed wins, and best moves. Detailed reports include accuracy percentages, average centipawn loss, and visual threat indicators. Players can adjust analysis depth and time to suit their skill level.
Board and Position Tools
The Board Editor allows setting up custom positions for analysis, including Chess960 setups. Users can open PGN files with the PGN Viewer, draw arrows on the board, and explore games from Chess.com or Lichess.
Engine Features
Play against the computer at your level or watch engines battle each other in Engine vs Engine mode. Users can add multiple engine lines, play engine lines, and adjust engine settings such as hash values, threads, and NNUE support in the Pro version.
Smart Features
Chess Image Scanner quickly analyzes 2D board images, providing instant move recommendations. App shortcuts allow long-press access to favorite features. Annotated PGN export lets players save analyzed games with notes for later review.
Customization
Chessis offers customizable boards, pieces, and display options. Users can enable visual aids like threats, move strength indicators, and arrows. Reports can be analyzed by time or depth to match personal learning preferences.
Pro Version Benefits
The Pro version unlocks unlimited engine lines, deeper analysis, "why blunder" lines, mistake alerts while playing, and ad-free experience. Pro users can analyze unlimited games, adjust report depth, and get advanced insights unavailable in the free version.
Learning and Improvement
Chessis not only points out mistakes but explains them, providing users with actionable insights to improve strategy, tactics, and endgame performance. This combination of detection, explanation, and visualization creates a comprehensive training tool.
FAQs
Q1: What is Chessis?
Chessis is a chess analysis app that uses advanced engines to detect blunders, missed wins, and best moves while providing detailed game reports.
Q2: Can Chessis analyze online games?
Yes, Chessis supports games from Chess.com and Lichess and allows import of PGN files for offline analysis.
Q3: What engines does Chessis use?
Chessis integrates Stockfish 18 and allows multiple engine lines, engine battles, and adjustable engine settings including hash value and threads.
Q4: What are the benefits of the Pro version?
Pro offers deep analysis, unlimited engine lines, mistake alerts, ad-free experience, NNUE support, and enhanced game report depth and time.
Q5: Does Chessis help players learn why they made mistakes?
Yes, Chessis explains blunders and missed wins, providing detailed reasoning and insights to improve chess strategy and skills.
Version History
v13.5—27 Oct, 2025
- See which games are being analyzed and which are queued.
- Tap "Do in background" on the main Analysis screen to send the current game to background analysis and keep using other screens.
Fixes
- Resolved a bug with Retry Mistakes (Pro).
Thanks for reporting bugs and suggesting improvements!
v13.4—22 Oct, 2025
Highlights
- Fixed engine line count not updating correctly
- Resolved closing issue after opening via Lichess
- Improved right-swipe navigation responsiveness
- Auto-adjust hash & thread settings to match your device resources
Thanks for all the bug reports and suggestions!
v13.2—17 Oct, 2025
Bug fixes and improvements
• Resolved issues with Game Report graphs
Thanks for the reports! If you spot anything else, email us at support@chessis.app.
