ChessNest: AI Chess & Puzzles

Learn chess, sharpen your tactics, and understand every game you play.

ChessNest brings AI opponents, 470,000+ tactics puzzles, step-by-step lessons, and move-by-move game analysis together in one app, for first-time players and improving players alike. Use it in English or Korean and switch anytime in Settings.

■ PLAY THE AI
• 15 AI characters with different strengths and playing styles, from beginner to grandmaster
• Adaptive opponents that adjust to your level
• Bullet, Blitz, Rapid, and Classical time controls

■ PLAY ONLINE
• Rated online games with Glicko-2 ratings
• Quick matchmaking in Bullet, Blitz, Rapid, or Classical
• Challenge a player from their profile, rated or casual
• Watch live games in progress

■ 470,000+ TACTICS PUZZLES
• Puzzles adjust to your puzzle rating automatically
• Train by theme: forks, pins, skewers, discovered attacks, checkmates, and more
• See your weakest themes and get practice suggestions
• Puzzle Arena: 3-Minute Rush and Survival, each with its own leaderboard

■ LEARN STEP BY STEP
• 11 lesson units, from the board and pieces to checkmate, basic tactics, and endgames
• Your progress is saved automatically
• Coordinate Trainer and Opening Explorer

■ GAME ANALYSIS & AI COACH
• Move-by-move analysis powered by the Stockfish engine
• Accuracy, mistakes, blunders, and key moments at a glance
• AI Coach commentary on every move: the better move, what each mistake cost, and what to practice next

■ TOURNAMENTS & LEADERBOARDS
• New Arena tournaments every day
• Create your own Arena, Swiss, or Round Robin tournament
• Leaderboards and player profiles

Signing up is free, and no credit card is required.