Issues

Evaluation displaying best move instead of excellent move when missing a move that could lead to an earlier mate.

When moving pieces too fast, sliding motion is intersected.

Sounds are sometimes playing too late.

Every move needs to be revisited after auto-eval in order to show total accuracy.

Accuracy sometimes showing NaN.

Arced movement is weird.

What I want to add next:

DONE - Default sounds that are not from chess.com.

DONE - Play button doing the auto-eval.

DONE - Best move showing the depth it has been analysed to.

Limit auto-eval by depth rather than amount of nodes.

Save and load pgn's with evaluation saved, so it can be revisited.

Add buttons that allow easy pasting of pgn.

DONE - Add some more themes and sounds.

Add comments to code, make it more readable and optimize everything.

I have been trying to set this up after installing nibbler but it's not working, so if someone can tell me how to do it please replay.

I'm on Linux by the way.

Sliding pieces and board sounds would make this Redesign perfect! Beautiful work!