Why setup is better than screenshots for review
A screenshot shows the position, but software cannot calculate from it. The value of an online position editor is that it turns a static image into board data a program can read. Once exported as FEN, the same position can move between phone, desktop, teaching notes, and the analysis page.
This matters in review because many important nodes are not full game records. They are exact positions after one critical move. Saving those nodes as FEN lets you return to the problem immediately instead of replaying the whole game.
- Screenshots are good for display; FEN is better for analysis and storage.
- Board setup turns endgames, puzzles, and review nodes into standard data.
- The same FEN can be reused across devices.