I recently noticed a possible bug in the site's pgn viewer. I was reading the answers to the question in this page. The first answer had a replayer. At one point of time when a pawn should capture a knight, the capturing move was not displayed correctly and it appeared as below: Instead of the pawn capturing the knight, both stay in the same square

I moved back to the starting position and the knight and the pawn where displaced as you can see below: Pawn and knight displaced

Is this a bug or is it simply because something is wrong with my browser?

1 Answer 1


It's a bug. I fixed it in the github repo last year at some point, but apparently the version here hasn't been updated.


The issue is that any time there's a pawn move bxa6 it is incorrectly interpreted as an en passant capture which removes the piece at a5 but not at a6.

  • 1
    Thanks! I've updated the player to latest (and sent you a pull request with a bugfix I had to make). This will be in the next build of the site.
    – balpha StaffMod
    Dec 4, 2013 at 5:47
  • The PGN viewer used in this site seems to have very limited features. Why don't we include features that are available in sites like chess.com? Dec 4, 2013 at 10:11
  • @balpha looks awesome, thank you for updating it!
    – Andrew Mod
    Dec 5, 2013 at 5:12

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