The phrase "possible move" refers to an action or decision that you can make in a certain situation. It means that there are different options or choices available to you, and you can consider and choose from those options. Full definition
If the sequence of possible moves branches like a tree, the group found that main branch after main branch led to a draw. (scientificamerican.com)
We have been hearing for weeks about the big and brilliant striker's possible move from the French champions when the current season ends. (justarsenal.com)
So, while it is still possible they move into first, this match doesn't mean a whole lot to them either. (eplindex.com)