[IvanChess744v3]

We fixed the castling issue with Chess 744. Thoughts?

https://sites.google.com/view/chess-744/todays-744-game

[ActivePattern]

Yes, that appears to be another good solution to the castling trickiness! And probably how you assume castling works in Chess960 if you weren't given the rules.

[IvanChess744v3]

But that's the problem with Chess 960 - that's not how you castle at all in that variant.