Player cardGuest playerSaved on this device
1Level
0Points
0 of 270 guided lessons0-day streak
Play
Analyze
Diagnose
Train
Improve
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.
Puzzle workout
Choose your time.
Solve what is left.
Work through unsolved puzzles for the time you choose. Every puzzle uses the same board, feedback, scoring, and progress as Puzzle.
Active puzzle time
How long do you want to solve?
Only active, focused time counts. Pause whenever you need to.
Workout length30 minutes
Six puzzle branches
Pick a pattern. Find the move.
Each challenge opens instantly—no analysis wait and no account required.
0 solved
Solved puzzles stay checked on this device and sync when you sign in.
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.
Don’t have a game handy?
Try a guided lesson instead →
Position notebook
Preview a position.
Paste a FEN to put the position on the board.
Guided foundations
Your Chess Skill Tree
Use guided lessons and puzzle sets when you do not have a game to import.
Saved on this device
Pattern vision
0%TACTICS
Better positions
0%STRATEGY
Strong starts
0%OPENINGS
Resilient play
0%DEFENSE
Finish precisely
0%ENDGAMES
Board decisions
0%PRACTICAL PLAY
Puzzle workoutKeep solving
00:00 / 30:00
Workout pausedYour puzzle is waiting.
Interactive game lesson
Find 3 better moves.
Your game report
Personal training session
Your 5-minute workout
Built from the weakness in this game.