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Develop Your Chess
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you lose?
Paste one Chess.com or Lichess game. Get the three decisions that mattered—and a short workout built from your weaknesses.
Puzzle library
Choose a position.
Make the move.
Solve instant positions across six branches. Every answer happens right on the board.
Six puzzle branches
Pick a pattern. Find the move.
Each challenge opens instantly—no analysis wait and no account required.
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Solved puzzles stay checked on this device and sync when you sign in.
One game. Three reasons.
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Copy its PGN from Chess.com or Lichess. We ignore harmless engine preferences and focus on decisions you can learn from.
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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
Interactive game lesson
Find 3 better moves.
Your game report
Personal training session
Your 5-minute workout
Built from the weakness in this game.