Question 1

Where can I analyze my chess games online for free?

Accepted Answer

Right here. Paste your game in PGN format and the analyzer reviews every move, classifying each one as good, inaccuracy, mistake, or blunder. You get accuracy percentages for both players, centipawn loss per move, tactic detection for forks and pins, and beginner-friendly coach commentary explaining what went wrong and why. No account needed, works instantly in your browser.

Question 2

How do I copy my game from chess.com and analyze it here?

Accepted Answer

Go to your game on chess.com, click the share or download button, and copy the PGN text. Then come here, paste it into the input box, and hit analyze. The analyzer accepts standard PGN format from chess.com, Lichess, or any other chess platform. Within seconds you get a full move-by-move breakdown with accuracy scores, mistake highlights, and coaching tips.

Question 3

Can I paste a PGN from Lichess or any chess site to review my game?

Accepted Answer

Yes. The analyzer works with standard PGN notation from any chess platform - chess.com, Lichess, chess24, or any app that exports PGN. Just copy the PGN text, paste it here, and the analysis runs automatically. You can also type or paste just the moves without metadata headers and it will still work.

Question 4

How does the chess game analyzer detect my mistakes?

Accepted Answer

The analyzer uses a two-phase approach. First, a fast pattern recognition scan flags moves that look suspicious. Then a deep engine verification confirms exactly how many centipawns were lost and what the better move was. Moves losing 30-80 centipawns are inaccuracies, 80-200 are mistakes, and 200 or more are blunders. Each bad move gets an explanation of what went wrong.

Question 5

What is centipawn loss in chess and why does it matter?

Accepted Answer

Centipawn loss measures how much worse your move was compared to the best move, in hundredths of a pawn. If the best move keeps you equal but your move loses half a pawn of advantage, that is 50 centipawns lost. The analyzer shows this number for every suboptimal move so you can see exactly how costly each mistake was. Lower centipawn loss means more accurate play.

Question 6

Does this chess analyzer find missed forks and pins in my games?

Accepted Answer

Yes. The tactic detection system scans every position for missed forks and pins. When you miss a fork, it shows you the piece that could have attacked two targets at once with colored arrows on the board. When you miss a pin opportunity, it highlights the pinning piece, the pinned piece, and the valuable piece behind it. Each missed tactic is tagged directly on the move in the move list.

Question 7

How do I improve at chess by reviewing my games?

Accepted Answer

Game review is one of the fastest ways to improve because you learn from your own mistakes, not generic examples. After analyzing a game here, step through each move and read the coach commentary. Focus on your mistakes and blunders first - understand why the move was bad and what you should have played instead. Over time you will stop making the same mistakes and your accuracy will climb.

Question 8

What is a good chess accuracy percentage?

Accepted Answer

For beginners, anything above 50 percent is a solid start. Intermediate players typically score 70-85 percent. Strong players regularly hit 90 percent or higher. The accuracy score here is calculated from the centipawn loss on every move, so it reflects how close your play was to the best moves throughout the entire game. Use it to track your improvement over time.

Question 9

Can I analyze a chess game on my phone?

Accepted Answer

Yes. The analyzer works on any device with a browser - phone, tablet, or desktop. The layout adapts to your screen size, with the board, move list, and coach notes all accessible on smaller screens. Just paste your PGN and the full analysis runs right in your mobile browser.

Question 10

What is the difference between a chess game analyzer and a chess engine?

Accepted Answer

A chess engine just tells you the best move in a position. A game analyzer reviews your entire game move by move, classifies each decision, calculates your overall accuracy, detects tactical patterns you missed, and explains what went wrong in language you can understand. It turns a raw game into a learning experience.

Spider Chess

Spider Chess

Game Analyzer