indeed. also, i'm a bit suspicius, are those shadows pixel art? that amount of colors are a totally waste of effort, thus the shadow itself is not necesary(not for a chessboard). i suggest you to post this in the WIP section of the forums to get some C+C on how to improve this work.
slaudos!
The piece looks good, but there are unnecessary shades in the middle of each intersection between the squares.
You may want to lighten those shades.