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) Se apenas lê regularmente alguns fóruns, pode adicioná-los à sua lista de fóruns favoritos indo à página desse Fórum e clicando no link "Adicionar à minha lista de fóruns favoritos". (pauloaguia) (mostrar todas as dicas)