Hi Toffer
Just for info
The castle piece in chess is usually called the rook ( = Rock + fortified position in the "chees war!!!)
if the King and either rook are still on the back rank and free to swap places they can do so.
Which means the rook gets out into the fighting
And the King finds safety in a corner.
Havent started mine yet due to looking aftrer two little ones so wont finish before the dead line. Ah Me
THEa