Don't make the board diagonal. Is this necessary? I would just give some sort of birds eye with slight tilt. You can keep rotations in if people want to see on angle. I don't play a single game in rl that I try to have a view of the game board which is awkward. I've been on the fence about it. Maybe it is some attempt at creativity.. and most probably aren't bothered by it, and maybe its not big. But I just played a game of normal chess on kings of chess... I was just thrown a back at how awkward playing 8 x 8 chess diagonally with board set up actually is. Then I got to thinking that while it was weird for shuuro, why can't the boards just all be vertical? ?