Paste one complete game
PGN tags are optional, but standard algebraic move notation is required. Comments and variations may remain in the file.
Paste a game, step through the moves, and see which opening it reached. Everything is processed in your browser.
How to use the PGN viewer
Replay the critical moment
Use the move list or arrow controls to compare the notation with the position after each move.
Follow the opening match
An Opening tag takes priority, then the opening page in a Chess.com ECOUrl tag. Without either, the viewer compares the main line with trainable lines in the Chessmate catalog.
Try another free chess tool
Opening Quiz
Answer five questions to find which openings to play with White and Black.
Open tool →Opening Trainer
Play an opening line with coach notes, then replay it from memory for a score.
Open tool →Chess Traps Trainer
Practice 32 opening traps for White and Black until you can play them from memory.
Open tool →Opening Explorer
Compare popular moves from Lichess and master games, or browse them as an opening tree.
Open tool →Chess Openings List
Search every named opening by name, ECO code, or moves, then step through its line.
Open tool →PGN to GIF
Turn a chess game into a downloadable animated board.
Open tool →Chess Clock
Time over-the-board games with presets, increment, delay, and time odds.
Open tool →Board Editor
Set up any position, check that it is legal, then copy its FEN or save an image.
Open tool →Coordinates Trainer
Learn every square name by finding or naming squares against a 30-second timer.
Open tool →Rating Calculator
Enter your game results to see your new FIDE, US Chess, or Elo rating.
Open tool →