Every move, explained.
Your chess coach to turn recurring mistakes into training.
TheChessWhy reads your last 100 games, shows the mistakes you keep repeating, and builds a daily training plan around them. Then it checks your next games to see if those mistakes went down.
Free. We only read your public games.
How it works
- 1
Scan
Stockfish checks your last 100 blitz and rapid games. Each mistake comes with the position, the better move and a link to the game.
- 2
Train
A 7-day plan, 5 to 45 minutes a day. Exercises on your weak spots, your own positions to replay, and one thing to try in your next game.
- 3
Check
Play new games and scan again. Only games played since you started count, so you see whether each mistake really went down.
Only counts from your own games. No estimated rating, no score out of 100.
Learn and train for free
Lessons
Short lessons for beginners, one idea at a time.
69 lessons in 4 levels.
Openings
Learn the first moves of an opening, move by move.
458 openings in 134 families.
Endgames
Win or hold simple endgames against the engine.
157 positions in 12 groups.
Training exercises
Pick an exercise. Your daily plan uses the same ones.
34 kinds of exercises.