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The Chess Analysis Board

Master your game with our chess analysis board, the ultimate tool for chess analysis free. Easily chess analyze your matches with the latest Stockfish version. This chess analysis online platform provides a deep chess analysis engine and chess analysis pgn support for instant results. Enjoy a premium chess analysis online free through our responsive chess analysis app, designed as a chess analysis app free and optimized as a chess analysis app for android. Whether you follow chess analysis lichess styles or read our chess analysis blog, we offer the most complete chess analysis and Chess Analysis experience.

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Black Player (?)
White Player (?)

Complete Guide to Chess Game Analysis

Analyzing your own games is one of the most effective ways to improve at chess — far more effective than memorizing openings or watching random videos. This page explains how to use engine analysis correctly, what the numbers actually mean, and how to turn mistakes into practical lessons.

This guide is written for real players: beginners, club players, and online competitors who want to understand why a position works or fails.

Getting Started

Importing Your Games

You can analyze complete games by pasting a PGN (Portable Game Notation) into the input box or by dragging and dropping a PGN file from your computer. This allows you to review tournament games, online rapid games, or even casual blitz games in seconds.

Many players make the mistake of analyzing only their wins. For improvement, losses are far more valuable — especially games where the position was equal before one critical mistake.

Evaluation

Centipawns Explained

Engine evaluations are measured in centipawns — one centipawn equals one hundredth of a pawn.

  • +1.00 means White is slightly better.
  • -2.00 means Black has a clear advantage.
  • 0.00 usually indicates equality.

A common beginner mistake is panicking over small changes. large swings usually signal a serious positional or tactical error. If you see something like #M3, the engine has detected a forced checkmate in three moves.

Move Classification

What Actually Matters

Each move is classified to help you prioritize your study:

  • Best Move (Green): Matches the engine's top choice
  • Inaccuracy (Yellow): Slightly weak, but usually recoverable
  • Blunder (Red): A serious mistake that changes the evaluation dramatically

Don't waste time obsessing over minor inaccuracies. Real improvement comes from understanding why blunders happen — missed tactics, misjudged king safety, or poor piece coordination.

Why Fast, Private Analysis Matters

Client-Side Privacy by Design

Most free chess tools upload your games to external servers. This means your preparation games, opening experiments, and personal analysis are stored elsewhere.

This tool runs Stockfish directly inside your browser. Your games never leave your device. Nothing is uploaded, tracked, or stored remotely.

Full Engine Strength — No Artificial Limits

The engine used here is latest Stockfish version, compiled for the web. This allows for deep positional understanding, accurate tactical calculation, and modern evaluation standards — without server-side restrictions or hidden limitations.

A Practical Workflow for Chess Improvement

If you want results, follow this process instead of blindly clicking "next move":

  • 1. Guess the Move First: Before checking the engine, stop and choose the move you would play. Compare your idea with the engine's suggestion and ask why they differ.
  • 2. Check the Opening Phase: Identify where you left known opening principles or book moves. One early mistake often creates problems much later.
  • 3. Study Critical Mistakes Only: Use the key moments or blunder points. Recalculate the position until you understand the tactical or positional idea you missed.

This habit — repeated consistently — is how players actually improve.