unpuzzle

You play differently when you know it's a puzzle.

play

no account needed

how it works

See a position

There might be a tactic, there might not.

Make your move

Study the board. Pick a move. Confirm it.

Get scored

Stockfish compares your choice to the best move.

unpuzzle mixes puzzles, endgames, and quiet positions to force you to think like a real game. Your ACPL (Average Centipawn Loss) tracks accuracy against the engine. Lower is better.