I just tried the new Omega Chess preset in Move Mode, and found that while castling kingside is done correctly (with king moving just two steps), the preset has queenside castling incorrectly handled, with the king moving three steps (to c-file, not two steps, to d-file, as per the Omega Chess rules page).
@ Fergus
I just tried the new Omega Chess preset in Move Mode, and found that while castling kingside is done correctly (with king moving just two steps), the preset has queenside castling incorrectly handled, with the king moving three steps (to c-file, not two steps, to d-file, as per the Omega Chess rules page).