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The Pawn Bug Finally Fixed

Lichess Team Announcements

We finally did it!

After an overwhelming amount of feedback we have finally been able to fix the pawn bug that has been plaguing both online and over the board chess for hundreds of years. Until now the bug has been shamelessly exploited in about 3% of all games played on Lichess.

The lead developers have been working night and day trying to find a solution. Only recently they discovered a new type of technology that allowed us to motion track realistic pawn movements.

Source: https://giphy.com/gifs/pro-chess-aJmdgrIm822bu

Lichess is proud to be the first chess provider in the world to solve this highly complex bug. We expect others to follow suit.

The change in its full glory can be found here: https://github.com/ornicar/scalachess/pull/171.

Many thanks to everyone that made us aware of the problem by either contacting us directly or through the forums.

  • "One second his pawn is over here, suddenly it's there?!" - Man (34)
  • "My pawn just disappeared without a trace." - Woman (41)
  • "She like moved her pawn from like THERE to like HERE and I was like whaaaaaaaat..." - Girl (14)
  • "When you know the rules of chess, they let you do it" - Man (Orange)
  • "REEEEEEEEEEEEEEEEEEEEEEEEEEE!" - Boy (14)
  • "Broooooooo?" - Man (21)
  • "Mooo???" - Cow (10)

Haters will claim it's not a bug but a feature.

We are currently keeping the bug safely quarantined here: https://lichess.org/learn#/15.

We apologize for the inconvenience. Next up on the fix list is a weird bug that in some positions allows the King and Rook to jump over each other.