hooshdar3
I've answered several of your questions over the past few days and they all seem to be related to the game of chess. I even remember you mentioned that you were an Iranian national coach for your chess team. So, I am going to assume that this question also refers to chess (and/or a chess move). If I am correct, "practically" means "almost".
In the future, please provide whole sentences so that we can answer your questions with certainty. Tell us what and if it has to do with chess (or another subject) and, basically, give us as much information as you can.
John