King Already Home

Now this is my favourite trick — "castling in place"! The king is already standing on g1, right on his final square. Think there's nothing to castle? Rookie mistake: you still need to castle so that I fly out to f1 and take the file. The king won't budge a single square — I do all the work. Drag the king onto the rook on h1!

The king didn't move an inch, and I'm already on f1! Now that's service.