That is what I would think. If your opponet has two or more pieces on a particular spot that you were trying to move to, the program just wouldn't let you move that piece.
(esconder) Ao submeter uma jogada, pode escolher o próximo jogo a mostrar, seleccionando a opção apropriada na lista ao lado do botão Submeter. (pauloaguia) (mostrar todas as dicas)