Yeah i don't quite get this. It seems to more or less fill in gaps? Which for Tetris makes the game trivial? Even on hard i had cases where i intentionally made

Yeah i don't quite get this. It seems to more or less fill in gaps? Which for Tetris makes the game trivial? Even on hard i had cases where i intentionally made gaps, scored a line and then the pieces flipped, fell, closed gaps and chain reacted to an almost empty board.