When using Chrome and zooming out to 75% with a resized board as well, the green previous/new move square overlays imprecisely cover their respective squares. The right/bottom edge let the underlying square color peek out, which is very distracting.
(I don't see this in Safari or Firefox, but last I checked Chrome was the #1 recommended browser.)
(I don't see this in Safari or Firefox, but last I checked Chrome was the #1 recommended browser.)