Since Mom goes off the deep end (sorry Mom), she did some research and found out that the size of the squares on the chessboard was supposed to be related to the size of the Chess pieces. Turns out that 2-1/4" was the "regulation" size. So these chessboards are made that way.
She made him a chessboard, didn't like it, and made another. And another. And another. Then she got really hooked. All together she made about 40.
Here are 13 of Mom's favorites. You can click the pictures to biggify.
1.
So what does Mom do with all the leftover pieces? She makes a quilt, of course: