qualle is a Chrome add-on developed by jan.kechel that brings a fun twist to the popular online chess platform, Lichess. This free add-on replaces the traditional Rook symbol on Lichess.org with a Jellyfish symbol, giving players the option to play chess with a Jellyfish instead of a Rook.

With qualle installed, the Jellyfish symbol is displayed in a similar style to the original Rook symbol, seamlessly integrating into the Lichess interface. This add-on adds a touch of whimsy to your chess games, allowing you to enjoy the game with a unique visual element.

If you're looking to add a bit of fun to your chess matches on Lichess.org, qualle is a great choice. Install this Chrome add-on and enjoy playing chess with a Jellyfish as your Rook!