Develop Your Chess
Why did
you lose?
Paste one Chess.com or Lichess game. Get the three decisions that mattered—and a short workout built from your weaknesses.
Start without a PGN
Choose your next challenge.
Each game becomes up to three clear positions for you to solve.
Solve all positions to advance the skill and unlock more of the path.
View all puzzles →One game. Three reasons.
Paste the game you want to understand.
Copy its PGN from Chess.com or Lichess. We ignore harmless engine preferences and focus on decisions you can learn from.
Position notebook
Preview a position.
Paste a FEN to put the position on the board.
Your improvement profile
Your Chess DNA
Patterns from the games you analyzed here.
Every independently solved challenge adds category points.
Start today’s workout →Guided foundations
Your Chess Skill Tree
Use guided lessons and puzzle sets when you do not have a game to import.
TACTICS
STRATEGY
OPENINGS
DEFENSE
ENDGAMES
PRACTICAL PLAY
Interactive game lesson
Find 3 better moves.
Your game report
Personal training session
Your 5-minute workout
Built from the weakness in this game.