You lose for thesame reason every game.
You open central files before your king is safe enough to survive the attack.
Next step: targeted drills and spaced repetition tied to this exact blind spot.
Real coaching output
What the coach actually says.
Not "Nf3 was better." A specific, repeatable blind spot — plus the drill to fix it.
ChessAI Coach
Post-game analysis · Move 14: Nxe4
You are not scanning for pinned pieces before committing to active moves. This pattern appeared in 7 of your last 10 games.
The knight on e4 is strong because the Bb4 pin stops Nc3 from recapturing. You committed to this move before checking if the knight could be safely exchanged.
Next: 8 pin-recognition drills
0 / 8 complete · ~12 minutes
How it's different
Diagnosis, not engine lines
We tell you why you blundered — not just which move Stockfish preferred.
Drills from your own games
Every puzzle is built from a position you actually reached and missed.
Free to start, no card
Paste any PGN and get your first full diagnosis without signing up.
Not just a game — a complete learning tool. The AI gameplay, puzzle challenges, and coaching features are particularly helpful for practicing strategies and understanding the game better. A smooth and enjoyable experience for both beginners and experienced players.
Meghana
Chess.com player
I've been stuck at 1200 for two years. The first analysis flagged that I was missing back rank threats in over half my games. The drills were specific to that — not random puzzles — and within two weeks the same mistake was showing up far less often.
Michael
Club player · 1200 rated
Every analysis tool just shows you the best move. This is the first time something told me why I keep going wrong in the middlegame. Plain English, no engine notation. I actually understood what I needed to fix.
Fred
Casual player · Chess.com user
I play a lot of blitz and always assumed my losses were just random blunders. Turns out I have one specific pattern — missing knight forks when I'm low on time. Three weeks of targeted drills and my blunder rate has dropped noticeably.
Ravi
Blitz player · 1400 rapid
The coaching loop
Diagnose. Train. Improve. Repeat.
One real game. One diagnosis. One next action. One measurable improvement path.
GAME
Play anywhere or paste a PGN
DIAGNOSIS
One pattern behind your losses
DRILL
Targeted reps on your exact blind spot
PROGRESS
The leak shows up less next month
After every game, you get:
Measurable improvement
Track your improvementover time.
Users come back when the same weakness shows up less often. We make that visible.
Missed pins per 10 games
Week 1
7
Week 3
2
Blunder rate under time pressure
Week 1
18%
Week 3
11%
Winning position conversion
Week 1
42%
Week 3
61%
This is the retention story: run the next drill, and watch the same mistake appear less often.
Play games to generate data
Games reveal the positions and habits that keep costing you rating — on any platform.
Pattern behind the loss, not engine lines
We surface the blind spot behind the loss — not a wall of Stockfish notes.
3 / 8 complete
Train only the mistakes you make
Drills only matter if they're tied to the exact thing you keep missing.
Blunders / 10 games
Track whether the leak shows up less
You should see the recurring pattern shrink over time. Otherwise the training isn't working.
This is for you ifyou actually want to improve.
Better filtering usually improves conversion. The right users feel seen faster when you stop pretending the product is for everyone.
This is for you if…
Probably not for…
Start free.Improve fast.
The free tier should prove the diagnosis loop. Paid plans are for continuity: full tracking, deeper analysis, and a stronger training system.
Core play and puzzles for consistent daily improvement.
Deeper personalized coaching for regular improvers.
Full-depth coach intelligence and competitive prep.