Why reviewing your games works
Playing more games teaches you slowly. Reviewing them teaches you fast, because it shows you the exact moment your plan went wrong and the move you should have found. You do not need a coach or a paid membership — a free engine review does most of the work.
Step 1: Load the game
Open game analysis and enter your chess.com or lichess username to pull your recent games, or paste a PGN for a single game. Everything runs locally in your browser with Stockfish, so there is no signup and no limit.
Step 2: Try it yourself first
Before you look at the engine, guess what your losing move was. Actively predicting where things went wrong trains the skill you actually use during a game.
Step 3: Find your first big mistake
Do not review every move equally. Jump to the first large evaluation swing — the moment you went from equal to worse. That single move usually teaches more than the whole rest of the game.
Step 4: Understand the better move
Look at what the engine suggested and, more importantly, why. Was it a tactic you missed? A piece you left hanging? A plan that was too slow? Name the reason — that is the lesson.
Step 5: Spot the pattern and train it
Most players lose the same way over and over. Once you notice your recurring mistake, drill it with blunder puzzles built from your own games. Do this after every session and your rating will climb. For the meaning of the labels you will see, read What Is Accuracy in Chess?