That's black walnut and maple with a movingui perimeter and a wenge outer frame in #17. Nice board too but I guess you're not biting on a purchase or will you? You'll have to custom order that one for sure. At one time he had it in his website for sale, I don't recall if the 2.25" square size was the one selling. Perhaps the 2.0" square and 2.5" square were selling in 2018 if I remember correctly.
Yes, that one has the playing squares in that wood combination in that photo post #31 you shared a little while ago. The frame appears to be black walnut which is one of my favorite types of woods for a board's squares or accenting frame. The grain structure in the movingui wood is quite prominent and flows rather nicely for the light squares in the playing field of 64.
Yep. What's your guess on the woods used in post #17? I'm interested in it for the muted/light'ish colored woods used for the squares with the dark frame setting the whole thing off; it could be maple/walnut (I hope not) but it seems like something a bit different.