> 5.2 Moving
> Flag and Bombs are never moved (For the definition of „move‟: see chapter 6).
Chapter 6 shows the sequences of moves, and then Chapter 7 says:
> A move is made when:
> a piece is released on another square than the starting one, or
> a player touches an opponent‟s piece with one of his own pieces or with the hand in which his own piece is held.
So if the piece was picked up and replaced on the starting square, it was not moved, and that's fine.
On the other hand, these rules incorporate some other rules by reference which includes:
> The bombs and the flag may never be moved and therefore remain in the same place throughout the duration of the game
A bomb hasn't exactly remained in the same place if it's been picked up, has it?