D4Chess ClubAI Chess Training for Club Players
Stop Blundering.
Start Winning.
AI coaching that explains your mistakes — not just the best move. Built for club players who want to actually improve.
Free to start · No credit card required · d4chess.club
Everything in the Free Plan
No credit card. No time limit. Start improving right now.
Play vs Computer
Adjustable from 1000 to 3200 Elo. Find the exact level that challenges without crushing you.
Stockfish Analysis
Every move classified — excellent, inaccuracy, mistake, blunder — with the engine's best continuation.
Real-Time Threat Overlay
See attacks, hanging pieces, and king danger rendered on the board as you step through every move.
Puzzle Practice
Hundreds of tactical puzzles. Spaced repetition keeps you drilling the patterns you miss most.
Chess Basics Course
Board, notation, pieces, values, and center control — the foundation every improving player needs.
Leaderboard
Ranked by accuracy, XP, puzzle rating, and improvement trend. See where you stack up.
Free vs Premium
Start free and upgrade when you're ready to go deeper.
- ✓Play vs Computer
- ✓Stockfish game analysis
- ✓Puzzle practice
- ✓Chess Basics course
- ✓Leaderboard
Cancel anytime. 7-day money-back guarantee.
- Everything in Free, plus:
- 🧠AI Socratic Coach
The coach asks targeted questions about your mistakes — building pattern recognition instead of just giving answers.
- 💬AI Position Analysis
Ask the AI to walk you through any position, explain the threats, and suggest the right plan.
- ⚔Tactics 101 Course
23 lessons on forks, pins, skewers, and discovered attacks — taught from real grandmaster games.
- 📖Opening Principles
10 core principles, 30 grandmaster games. Understand WHY every opening works.
- 🧩Unlimited Puzzles
Free accounts get 5 puzzles per day. Premium is unlimited — drill as long as you want.
- 🏁Endgame Fundamentals
- ⚡Attacking Chess
- ♜Positional Mastery
- 🎯Personalized Drills
- 🔁Spaced Repetition
- ♟Opening Repertoire Trainer
- 🏆Achievement Badges
- 🏟Club Tournaments
How It Works
Play a game, step through moves, let the AI coach you.
Play or Import a Game
Play vs the computer at your level, or paste a PGN from Chess.com or Lichess.
Step Through the Moves
Navigate move by move. See threats, hanging pieces, and Stockfish's best line in real time.
Train Your Patterns
Solve puzzles matching your weak spots. Track your rating, XP, and improvement over time.
What Players Are Saying
"Finally an app that teaches me WHY a move is bad, not just WHAT the best move was."
Rated 1450 on Chess.com
"The threat overlay alone is worth it. I can see the whole board in a way I never could before."
Club player, 1800 USCF
"Went from 1200 to 1600 in 4 months using D4 Chess Club™ daily."
Casual → Competitive
Share D4 Chess Club™
Stop Losing to the Same Mistakes.
Every blunder is a pattern. D4 Chess Club™ trains you to see them coming — free.
Create Free AccountNo credit card · Free forever · Upgrade anytime
No credit card · Free forever · Upgrade anytime