Questions & Answers about Retrocede una casilla.
It is the affirmative tú command of retroceder.
- retroceder = to move back / to go back
- retrocede = move back / go back / back up
This is the command form you use when speaking directly to one person in an informal way.
Examples:
- Retrocede una casilla. = Move back one space.
- Avanza dos casillas. = Move forward two spaces.
Because retroceder is the infinitive form, meaning to move back or to go back. In this sentence, you are telling someone to do it, so Spanish uses a command form.
Compare:
- retroceder = to move back
- retrocede = move back! / go back!
So Retrocede una casilla is an instruction, like something you might read in a board game.