The goal of this Tetris puzzle is to completely clear (empty) the top three rows of the grid (rows 0, 1, and 2). Specifically, the following positions must all be empty at the end:

- **Row 0:** positions f0-0f, f0-1f, f0-2f, f0-3f  
- **Row 1:** positions f1-0f, f1-1f, f1-2f, f1-3f  
- **Row 2:** positions f2-0f, f2-1f, f2-2f, f2-3f  

In other words, the puzzle is solved when no Tetris pieces occupy any of the positions in these three rows. All pieces initially located in these rows must be moved downward into lower rows (rows 3, 4, or 5) to achieve this goal.