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Find the broken move.

Paste a PGN that will not import. The checker reads every move and says what is wrong, on which line.

One problem stops this game from importing.

1 to fix, 1 worth fixing, 1 good to know.

  1. Good to knowLine 1

    No Site or Round header. Most chess programs expect Event, Site, Date, Round, White, Black and Result.

    [Event "Club night"]
  2. Worth fixingLine 4

    The date "4/11/2026" is not in the PGN form, year.month.day, for example 2026.11.04.

    [Date "4/11/2026"]
  3. Must fixLine 8, 12. Nf6

    No white knight can go to f6 here. The game stops here; later moves were not checked.

    6. cxd4 Bb4+ 7. Nc3 Nxe4 8. O-O Bxc3 9. d5 Bf6 10. Re1 Ne7 11. Rxe4 d6 12. Nf6 1-0

Nothing is stored or sent. The check runs in your browser.

How to use it

  1. 1

    Paste the PGN, or drop the file on the box.

  2. 2

    Read the list: each problem has its line, its move and what to change.

  3. 3

    Fix the line and check again, or open the game in the viewer.

Your AI assistant can use this tool too, and you check anything before it's shared or printed.

In the app

Imports that explain themselves

When a file will not import, Plyfolio shows the same plain words and lets you correct the move on the spot.

See importing

Made by Plyfolio, the chess scoresheet app for iPhone and Android. £9.99 once, no account. About Plyfolio