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.