Odd 1-pixel misalignment of shading after premove

[samthegitguy]

Exact URL of where the bug happened

https://lichess.org/nJGBROyvdDb9

Steps to reproduce the bug

1. Play any move
2. Play any premove

What did you expect to happen?

A blue color appears on the initial and destination squares.

What happened instead?

The blue shading appears one pixel misaligned from the square.

Operating system

Windows 11

Browser and version (or alternate access method)

Opera GX 110.4

Additional information

[johndoknjas]

I get it as well on the default board theme:

However on the board theme I currently use, I don't seem to:

From my tests, the themes I get the issue on are brown, wood, blue, ic, green, purple, and newspaper. Possibly for olive and grey too, can't really tell for them. Of those first 7 themes though, 6 (except wood) have an svg file-ext in _boards.scss (and there are no other svgs in _boards.scss). So maybe this has something to do with the bug.

[johndoknjas]

#16408 should fix this issue for all the board themes except "newspaper" and "wood". For the former it's probably not worth fixing (and not too noticeable), while for the latter it's still a mystery. Wood is the only non-svg that had this issue.

[johndoknjas]

@samthegitguy I'd recommend keeping this open for now since it's fixed for 5 themes, but not for newspaper and wood.

[samthegitguy]

Right - I assumed we weren't going to fix that problem.

[johndoknjas]

Probably not for newspaper but it's still unclear what the issue with wood is.