D4Chess coaches you the way a grandmaster would — not by giving you the answer, but by training your eyes to spot threats, patterns, and opportunities in real time.
$5.99/month — Cancel anytime
Built for club players who are serious about improving, not just playing.
See attacks, hanging pieces, king danger, and contested squares rendered on the board as you step through every move.
Rather than just telling you the answer, the coach asks targeted questions that force you to find the idea yourself — building lasting pattern recognition.
200+ ECO openings detected in real time. Know immediately when you step into a Najdorf, Catalan, or King's Indian — and what principles apply.
Adjustable from 1000 to 3200 Elo. Find the exact resistance level that challenges without crushing you.
Every move classified — excellent, inaccuracy, mistake, or blunder — with the engine's best continuation shown.
Fork, pin, skewer, hanging piece — the engine tags each mistake type so you know exactly what patterns to drill.
Import a game, step through moves, let the AI coach you.
Paste a PGN from Chess.com, Lichess, or any source. Single games or full exports.
Navigate move by move. The board shows threats, hanging pieces, and king danger in real time.
When you blunder, the AI coach asks the right question — training your pattern recognition instead of just showing the answer.
"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 D4Chess daily."
Casual → Competitive
No gimmicks. Cancel anytime.
Every blunder is a pattern. D4Chess trains you to see them coming.
Open the Board — It's Free