Welcome to ChessOS
Your adaptive chess training begins here.
🎯 Today's Mission
Personalized tasks based on your weakness analysis and current milestone.
📈 Grandmaster Roadmap
🚀 Highest-ROI Activity
📊 Skill Snapshot
⚡ Daily Quests & Streaks
Complete tasks to earn bonus XP. Practice daily to maintain streaks!
🏅 Achievements
⚡ Skill Training Exercises
Quick challenges to sharpen tactical vision and pattern recognition.
🆕 Start New Game against AI
🔍 Game Review Engine
Paste PGN to analyze accuracy, blunders, and get an estimated performance rating.
Analysis Log
🧪 Opening Lab & Repertoire Builder
Build your White and Black repertoires. Practice with spaced repetition drills.
Your Repertoire Lines
Select a line
🎯 Tactics Progression Academy
Master each tactical motif to advance. Click a category to practice puzzles.
🏛️ Strategy Academy
Learn positional chess concepts that separate club players from masters.
Select a Strategy
📖 Endgame Curriculum
From opposition to fortress defense. Master endgames tier by tier.
Select an Endgame
🎓 Famous Games Academy
Study immortal games from the greatest players in history.
Select a Game
Moves
Key Annotations
Lesson Summary
🧠 Weakness Detection & AI Coach
Your personal coach analyzes patterns and tells you exactly what to study and why.
🧙♂️ Coach's Speech Bubble & Forecast
Your personal coach's daily analysis and ELO improvement projections.
📋 Personalized Recommendations
💬 Chat with Coach AI
Ask your coach about ELO requirements, specific bosses, or study options.
🏆 Tournament Center
Compete in simulated tournament pairings against AI opponents matched to your ELO. Track your Tournament Performance Rating (TPR).
📊 Tournament History
🕸️ Skill Radar
📈 ELO Growth Path
🔥 Knowledge Mastery Heatmap
Each cell represents a concept in your knowledge graph. Green = mastered, Yellow = learning, Red = weak.
👥 Study Profile & Community
Track your study sessions, create study groups, and compare progress across skill categories.
📋 Comprehensive Skill Assessment
Solve puzzles across Tactics, Strategy, Endgames, Calculation, and Visualization. Your results personalize your entire learning path.
Puzzle 1 of 14
Find the best move in this position.
💡 Concept — Difficulty: ⭐⭐
🏆 Assessment Complete!
💪 Strengths
🎯 Focus Areas
🌳 Knowledge Skill Tree
Master concepts to unlock advanced skills. Green = mastered, Blue = unlocked, Gray = locked.
🐉 Boss Battles & Certifications
Prove your mastery through timed challenges. Earn certifications and unlock rewards.
Challenge Complete!
📉 Learning Analytics Dashboard
Track your growth, identify trends, and optimize your training.
📈 ELO Progression
🕸️ Skill Evolution
📊 Concept Mastery Heatmap
Hover over cells to see concept details. Green=mastered, Yellow=learning, Red=weak.
📄 Weekly Report
⚡ Actionable Insights & Targeted Training
Analyzing your recent game errors to recommend targeted puzzles...
👁️ Visualization & Calculation Lab
Train your chess vision and calculate multiple moves ahead mentally.
🧑🦯 Blindfold Color Trainer
Identify the color of a square from coordinates without looking at the board.
🧠 Position Memory Trainer
Remember piece positions shown for 5 seconds and reconstruct the board.
🎬 Move Sequence Memory
Mentally follow a list of chess moves and type the final position coordinates.
🧮 Candidate Moves Calculation
Find checkmates and combinations 3-5 moves deep from candidates.