The last bullet point define stealing as taking stones from opponent "castle". What is the "castle" ?
A) - The stones layed on the (4) Ramparts area ?
B) - Any stone in the Ramparts(4) + Courtyard (2) ?
That implies what a stealable stone is. Can a robot take an element which is entirely in the opponent courtyard castle ? (typically the 3 deposited stones allowed as a storage)